Smart Emergency Call System SOS

SOS emergency call systems for seniors, people with disabilities and care facilities

One press – and the person calling for help is no longer alone.

Personal 4G SOS buttons and watches with GPS and fall detection, wireless 433.92 MHz systems for homes and care facilities, accessible WC call kits, ZigBee buttons for smart homes and a radar fall sensor. Different types send the alarm to different people, so below the product list you will find a selection guide based on 3 questions.

4G buttons and watches Home systems 433 MHz Accessible WC Care facilities Smart home (ZigBee) Fall detection Does it call 112?

Your mother lives alone and you are in another city? What matters most is not the button, but who will hear the alarm. See what to choose or ask us.

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Guide: how to choose an SOS emergency call system

The catalogue contains five different types of solutions, and they are not interchangeable: a 4G button calls relatives on their phone, a 433 MHz system alerts the carer in the same house, and a ZigBee button will not work at all without a hub. Here you will find a quick selection by situation, how the alarm reaches help, when fall detection is essential, what to check before buying and the most common mistakes.

Colour key: ■ information · ■ benefit, solution · ■ ⚠ check · ■ ⚡ safety, mistakes

Contents: 3 questions · What do you need? · How the alarm reaches help · Fall detection · Does it call 112? · What to check · Mistakes · Diagrams · FAQ

Start by answering 3 questions

Everyone presses a button the same way. What differs is where the person will be when help is needed and who will receive the alarm.

1. Where will the person be?
at home · in a facility · anywhere

→

2. Who must receive the alarm?
relative on the phone · carer nearby · nurse station

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3. Will the person manage to press?
if there is a risk of falling – fall detection

→

✓ The right system type

What do you need? Quick selection

Situation	Solution	Products
A senior lives alone, spends most of the time at home, relatives live in another city	4G SOS button worn around the neck with fall detection and two-way voice – when pressed it calls relatives, and they talk through the button	4G button with fall detection, IP67 4G pendant, white / black 4G button, 950 mAh, IPX7 / white
The button must always be within reach – in the shower and in bed – while the 4G device stays on the bedside table	Bluetooth pendant paired with a 4G button: the pendant is light (15.4 g, IP67) and sends the alarm through the base device, so it works within about 30–80 m of it – at home and in the yard	Bluetooth pendant, red / green compatible with ES-EV-07B
An active person walks outdoors and may get lost or wander too far	4G watch with GPS, geofences and fall detection – nothing to forget at home	SOS watch with heart rate monitoring SOS watch, another model Medical SOS watch, black / cream
Location tracking and an SOS button are needed, fall detection is not essential	Budget 4G GPS button with geofences	4G GPS button, black / red
The person being cared for is in another room or on another floor, the carer is in the same house	Wireless 433.92 MHz system: button or pull cord by the bed, audible and visual receiver with the carer. Wi-Fi models also send a notification to the phone app	Wall button with 1.5 m pull cord + receiver, IP55 Button + colour-coded receiver, up to 30 transmitters Wi-Fi receiver + 2 buttons Wi-Fi receiver + 2 buttons + wristband Wi-Fi receiver + button + wristband
A ZigBee smart home hub is already installed	ZigBee SOS button – the notification arrives in the same app and can be linked to a siren or lighting	ZigBee SOS button, CR2450 WOOX ZigBee SOS button
A Hikvision AX PRO security system is installed	Portable AX PRO panic button – the alarm goes to the security hub and the app	Hikvision DS-PDEBP1-EG2-WE, 868 MHz, IP66
Risk of falling where nothing is worn – in the bathroom, by the bed at night	Wall-mounted radar fall sensor: nothing to wear and nothing to press	60 GHz radar, fall detection 4×4 m, ZigBee 3.0
Accessible WC in a public building, office or café	Call kit: pull cord in the WC cubicle, visual and audible signal outside the door and a reset button	Wired WC kit, 230 V Wireless kit with reset and siren, 433.92 MHz
Nursing home unit, outpatient clinic, rehabilitation centre	Wireless system with numbered buttons and a display – shows which room is calling	10 buttons + display, IP55
Hospital, nursing hospital, senior home with several units	Modular nurse call system with corridor indicators, displays and watches – selected according to the site plan	Nurse call system, up to 400 buttons Project consultation

Most reliable – a combination, not a single device

Each type has a weak spot: a 4G button may be left on the bedside table, a 433 MHz receiver will not be heard by someone who is not at home, and a person lying unconscious will not press a wearable button. Two layers close these gaps.

Senior alone at home: 4G button with fall detection + Bluetooth pendant that can be worn in the shower.
Family member in care: 433 MHz pull cord by the bed at night + 4G button when the family is away.
High bathroom risk: radar fall sensor in the bathroom + wearable button elsewhere.
Public building: WC call kit in every accessible WC, with the signal where staff are always present.

How the alarm reaches help: 5 system types

Type	Who receives the alarm	What else is needed	Coverage	Power
4G buttons and watches	Up to several pre-set phone numbers: call, SMS, app notification with location	Nano SIM card with voice and data, app for settings	Wherever there is mobile coverage	Rechargeable battery, charging daily or every few days
433.92 MHz systems	Receiver (sound, light, display) in the same room or house; Wi-Fi models – also the app	Receiver – mains power; Wi-Fi models – home Wi-Fi	Tens of metres inside a building, depending on walls	Buttons – battery, receiver – adapter
Wired WC system	Visual and audible signal above the door or in the attendant room	230 V supply, cable to the indicator, installer	Inside the building, along the cable route	230 V mains
Smart home (ZigBee, AX PRO)	Phone app, siren or other automation	Compatible hub: ZigBee or Hikvision AX PRO	Hub network coverage	Battery (CR2450 etc.)
Professional nurse call system	Nurse station, corridor indicators, displays, nurse watches	Project design, signal repeaters for larger sites	Up to 200 m in open space per node	Buttons – battery, central equipment – mains

Simple rule: if the alarm must reach a person who is elsewhere, choose a 4G device. If help is in the same house or facility – a 433 MHz or wired system. If there is already a hub at home – choose a button that works with it, not a new separate system.

Fall detection: when it is essential

A fall is the most common reason a senior needs help. But after a fall a person may be unconscious, have an injured arm or simply be confused – and will not press the button. Fall detection sends the alarm by itself.

✗ What often happens

The cheapest button without fall detection is bought for someone who has already fallen
The button is taken off before washing – and the fall happens exactly in the bathroom
The wearable button is left on the bedside table at night
Nobody checks the settings – sensitivity is too low or the device calls for no reason, so it gets switched off

✓ How it should be

With a risk of falling – a device with fall detection: ES-EV-07B-4G, ES-EV12, ES-EV-04 or a watch
A waterproof device (IP67 / IPX7) is worn in the shower too
In the bathroom or bedroom – additionally a radar fall sensor that does not need to be worn
After setup the fall alarm and cancellation are tested, so the person knows how to cancel a false alarm

What you need to know about fall detection: the accelerometer recognises a sudden fall followed by immobility, so a slow slide off a chair or sitting down on the floor may go undetected. Fall detection complements the SOS button but does not replace it – the user still needs to know how to press the button. Heart rate and other health data from watches are for information only: this is not a medical device and not a diagnosis.

Does an SOS button call 112?

⚠ Not automatically. These devices do not notify emergency services by themselves.

4G buttons and watches call and send their location to the numbers you enter in the settings – usually relatives. They must be entered and tested before the device is handed to the user.
433 MHz, wired and nurse call systems signal only inside the building – to a receiver, display or nurse station.
ZigBee and AX PRO buttons notify the app and the hub.
We do not recommend entering 112 as an automatic call number: accidental presses and false fall alarms will call emergency services, and after a fall a person cannot always explain what happened and where they are. It is more reliable when the first call goes to a relative who knows the address and can call for help.
The first person to receive the alarm assesses the situation and calls 112 if needed. If you want the alarm to be received by a professional operator, contact a security or social care service provider about a monitoring centre service.

⚠ What to check before buying

KibirkštisBefore handing a 4G button to a customer I always insert the SIM, enter the numbers and make a call from it myself – otherwise the first real test will be a real emergency.

What to check	Why it matters
SIM card and plan	A 4G device needs a Nano SIM with voice calls, SMS and mobile data. The SIM PIN usually has to be disabled. A small amount of data is enough, but without it location will not be sent to the app.
LTE bands	Operators in the Baltic states use mainly LTE bands B3 (1800 MHz), B7 (2600 MHz) and B20 (800 MHz), and some also B1, B8 and B28. The device specification should include at least B3 and B20; B20 is especially useful in rural areas and inside thick-walled buildings. 3G networks are being switched off, so rely on 4G, not 3G.
Who will answer	Enter several numbers in order: if the first does not answer, the device calls the next one. Agree with relatives that these calls must not be missed.
Battery and charging	Watches and small buttons need frequent charging. Choose a charging routine the user will actually keep; enable the low battery notification.
Water resistance	If the button will be worn in the shower – IP67 or IPX7. IP55 buttons are meant for walls and splashes, not immersion.
Hub (ZigBee, AX PRO, Bluetooth)	ZigBee buttons need a ZigBee hub, the Hikvision button needs an AX PRO hub, Bluetooth pendants need a compatible 4G base device. Without them the button has nowhere to send the alarm.
Range in a building (433 MHz)	The range stated by the manufacturer is for open space. Reinforced concrete floors and several walls reduce it several times. Test the button from the farthest room and place the receiver centrally.
Number of call points	1–3 buttons are enough for a home. A facility needs a system that shows the room number on a display and allows the number of buttons to be expanded.
Voice calls: VoLTE or 2G	With 3G switched off, a 4G device makes calls via VoLTE (voice over the 4G network) or falls back to 2G. If the specification mentions neither, the SOS call may fail to connect even though data and location still reach the app. Ask us if you cannot find this in the description.
Power or internet outage	A mains-powered 433 MHz receiver and Wi-Fi model notifications do not work without electricity and internet. Choose a receiver with a backup battery or connect the router to a UPS. 4G devices do not depend on home power or Wi-Fi.
Wi-Fi network	Most Wi-Fi SOS receivers and smart devices connect only to a 2.4 GHz network. If the router broadcasts a single combined 2.4/5 GHz network, you may need to temporarily enable a separate 2.4 GHz network for pairing.
Personal data and consent	GPS tracking is processing of personal data. Track an adult's location only with their knowledge and consent; if the person cannot decide for themselves, the decision is made by their legal representative.

✗ Most common mistakes

Mistake	Consequence
4G button without a SIM or with an inactive SIM	The button lights up but calls no one.
A ZigBee button bought although there is no hub at home	The button has nowhere to send the alarm – a hub must be bought or the system changed.
A 433 MHz system for someone who lives alone	The receiver rings in an empty house – no help comes.
A button without fall detection for someone after a fall	An unconscious or injured person cannot press the button.
Only one number entered, and it often goes unanswered	The call goes to voicemail. A sequence of several numbers is needed.
Receiver or router without backup power	During a power cut the system goes silent – exactly during a storm or an outage, when help may be needed most.
The device has never been tested	Wrongly entered numbers or disabled notifications only come to light during a real emergency.
A wired 230 V WC system connected by yourself	⚡ Working with 230 V in a damp room – risk of electric shock. Installation by a qualified electrician.

⚡ Safe installation and maintenance – Fazė's advice

230 V powered WC call systems and receivers are installed by a qualified electrician; in damp rooms – a suitable IP rating and 30 mA residual current protection (RCD).
The WC pull cord must reach the floor or be reachable when lying down – people usually call for help after they have already fallen.
Test every button once a month and check the batteries; replace batteries as soon as the system reports a low level.
UAB „Elektrotechnikos sprendimai“ provides information for guidance only and is not responsible for incorrect connection, settings or installation errors.

☝ Elsprendimai.eu recommends: complete the safety of a senior or a person in care with smoke and gas leak detectors, smart home hubs for ZigBee buttons, smart gas and smoke sensors and video doorbells, so relatives can see who has arrived.

Diagrams: what often happens and how it should be

In each diagram the most common mistake is on the left and the correct solution on the right. The numbers in the diagram match the explanations below it.

Diagram 1. How the alarm reaches help. The button always works – the question is whether the alarm reaches someone who can help.

KibirkštisI pressed the button and the light blinked – so it works?

FazėThe button blinked, but whether the alarm reached anyone is a completely different question. Check the whole path: button → hub or network → a person who will answer.

How the alarm reaches help – diagram: wrong and right | elsprendimai.eu

☝ Click the diagram to open an enlarged version.

⚠ This diagram is for guidance only and may contain inaccuracies. Before installation, check against the manufacturer's instructions and the design.
Installation is the responsibility of the qualified specialists carrying it out. UAB „Elektrotechnikos sprendimai“ is not liable for connection or possible errors.

Why – explanation by diagram numbers

1ZigBee button and hub

✗ Button without a hub → ✓ Button paired with a ZigBee hub

Why: ZigBee is a short-range 2.4 GHz network through which the button cannot reach a phone or the internet directly. The notification is passed to the app by the hub connected to the home router.

2What a 433 MHz system is for

✗ A 433 MHz system for someone who lives alone → ✓ 433 MHz – when the carer is in the same house; 4G for someone living alone

Why: A 433 MHz transmitter sends the alarm only to its own receiver, a few tens of metres away inside the building. If there is nobody nearby to hear the receiver, the alarm stays in an empty house.

3SIM card and call sequence

✗ Inactive SIM and a single number → ✓ Active SIM and several numbers in order

Why: A 4G button calls through the mobile operator, so the SIM must be active and topped up. With several numbers entered, if the first does not answer, the device automatically calls the next one.

Diagram 2. Accessible WC call system. A person usually calls for help after they have already fallen, and the alarm must reach the staff outside the door.

KibirkštisThe pull cord hangs there anyway – why can't it be tied up higher so it doesn't get in the way of cleaning?

FazėBecause the person calling for help is usually already lying on the floor. A tied-up cord is a system that exists but does not work.

Accessible WC call system – diagram: wrong and right | elsprendimai.eu

☝ Click the diagram to open an enlarged version.

Why – explanation by diagram numbers

1Pull cord height

✗ Pull cord tied up at about 1.8 m → ✓ Pull cord reaches almost to the floor

Why: A call usually happens after a fall, so the cord must be reachable from the floor too. Cleaners often tie the cord up – it is worth checking at every inspection.

2Signal outside the door and reset

✗ Signal only in the cubicle → ✓ Light and sound above the door, reset in the cubicle

Why: The alarm must reach those who can help – staff in the corridor or in the attendant room. A reset button in the cubicle ensures the alarm is cancelled only once help has arrived on the spot.

3Supply and electrical safety

✗ 230 V without residual current protection → ✓ Supply via a 30 mA RCD, installed by an electrician

Why: A WC is a damp room. A 30 mA residual current device disconnects the circuit when the leakage current reaches a level dangerous to people – such protection for damp rooms is required by electrical installation rules.

Frequently asked questions

Asked by Kibirkštis – a young, curious electrician who dares to ask what others don't. Answered by Fazė – an experienced engineer.

KibirkštisDo I have to pay monthly for a 4G SOS button?

FazėThe device works with a SIM card from the operator of your choice, so you only pay for the connection – a prepaid card or a cheap plan with voice, SMS and data will do. Data use is low; the main thing is that the SIM is active and topped up. Whether the app has additional service fees is stated in the description of the specific device.

KibirkštisHow is a watch better than a button around the neck?

FazėA watch is always on the wrist, it is harder to forget, and some models also monitor heart rate. A button is simpler, larger, easier to press with stiff fingers and often has a bigger battery. A senior who does not like technology usually accepts a button more easily.

KibirkštisWhy do some 4G buttons cost three times more than others?

FazėLook not at the „4G“ label but at what lies behind it: fall detection, two-way voice, IP67 water resistance, battery capacity and the list of LTE bands. The cheaper 4G GPS button is fine for location tracking and SOS alarms, but it will not detect a fall by itself.

KibirkštisDoes any system react to shouting or moaning?

FazėNo. All systems in this group are triggered by a button, a pull cord or fall detection – you cannot call for help by voice or sound. If the person may not manage to press, choose a radar fall sensor that does not need to be worn, or a device with fall detection. 4G buttons with two-way voice let a relative hear what is happening after the alarm and talk to the person.

KibirkštisCan a person's location be tracked without their knowledge?

FazėYou shouldn't. GPS location is personal data, so track an adult's location only with their knowledge and consent. If illness means the person can no longer decide, the decision is made by their legal representative. It is best to agree on geofences and numbers together – then the device is used more willingly.

KibirkštisWill a 433 MHz system work through two floors?

FazėUsually yes, but it cannot be guaranteed – reinforced concrete attenuates the signal heavily. Before installing, press the button from the farthest spot and listen to the receiver. If the signal is unreliable, move the receiver closer or choose a Wi-Fi model with phone notifications.

KibirkštisIs a call system mandatory in an accessible WC?

FazėAn emergency call alarm for accessible rooms is usually specified in the building design. The exact requirement for your site is set by the designer according to the applicable building regulations – we help select equipment according to the design.

KibirkštisDo you help select a system for a facility?

FazėYes. Send us the floor plan or the number of rooms and WCs, where the alarm should go and who will receive it – we will select a system and send you a quote. Contact us.

Sources (checked 2026-10-09): LTE bands of Baltic operators; 3G switch-off in Lithuania; technical data – from the product descriptions in this group.

Help must come even when the person cannot call

4G buttons and watches, home systems, accessible WC kits and nurse call systems for facilities – all in one place. Tell us who needs the system and where: we will select a solution and help you configure it.

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