Devices Sold



6 months

Delivery (Business Days)


What does this device do?

This is a wireless GSM remote control switch that connects to 3G/4G GSM cell phone networks. It can be used to turn other electrical devices on or off through phone calls or SMS messages. This allows you to remotely control devices such as gate openers, garage doors, water pumps, aircraft pre-heaters, furnaces, air conditioners, and more from anywhere in the world.

This device does not come with a SIM card. Please contact your local cell provider and purchase a standard 3G/4G SIM card, and activate it on a pay as you go plan.

Item Description

This device has 2 independent relay switches. The first relay switch is activated by calling the SIM chips cell phone number. It will then reject the call without answering and trigger the first relay (which will turn on whatever device you've got hooked up). There are no call costs incurred when dialing the unit; it will recognize an authorized telephone number calling it and reject the call without answering. This relay has two modes. It can either be turned on by a call for a specific amount of time, or it can be set to turn on or off when a call is received.

The other independent relay(s) switch can be switched on or off by sending the GSM device an sms text message. Both relays can be controlled via a single SMS if required.

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Device Specifications
Working Voltage 12-24V DC @ 500 mA 1000 mA
# of Relays 2 relays rated for up to 240 V @ 30 amps

FDD LTE: B2 / B4 / B12

WCDMA: B2 / B4 / B5

Dimensions 200 mm x 125 mm x 82 mm (7.87 inches x 4.92 inches x 3.23 inches)
Operating Temperature -25 C to +60 C, -12 F to 140 F
Standby Power 20 mA @ 12V DC
Mobile Apps Android, iOS
Password Protection Yes
Access Control List Yes
Access Control List Size 200 Phone Numbers
Relay Timer Granularity Milliseconds, Seconds, or Minutes
Case Protection Rating IP56
Operating Modes Momentary and Latching

Applications include the remote control of heating in holiday homes, lighting, engine pre-heaters, aviation engine heaters, irrigation systems, water well pumps, pumping stations, cabin heaters, resetting of remote servers, arming and disarming security systems, access control of gates and garage doors.

I personally use two of these devices. I've soldered contacts onto the remote key fob for my remote car starter and have attached these wires to the switch on the GSM device. When I call the GSM devices SIM card, the switch is activated and it connects the two contacts on the key fob to start my vehicle. This triggers my remote car starter and starts the car, all from a quick call from my cell phone. The device can be conveniently mounted under the dash!


Delivery is typically completed to North America within 2 - 4 business days from the shipping date.

Delivery everywhere else in the world is typically completed within 2 - 4 business days from the shipping date.

Instructions & Usage

To view the PDF manual for this device, download it here: English GSM Manual

If you have any questions or are looking for advice on the topic of remote control devices, let me know! I will be happy to assist. The device comes with a serial cable that gives some of the same functionality as programming it by text message, but this is NOT required to setup the unit or for regular usage. No power cables, etc. are included but can be added on in some cases (with additional cost). This device does NOT come with a SIM chip.

Where have we sold to already?

Please contact us if you have any problems prior to providing feedback. We go to great effort to ensure you are happy with your purchase!

Supported Carriers

This device only operates in the USA, Canada, and Mexico.

Supported? Country Carriers
Canada Bell, Telus, Sasktel
Mexico Telcel, Iusacell, Movistar
Europe None
Asia None
South America None
Australia None
External Antenna Specifications
Working Voltage 12-24V DC @ 500 mA 1000 mA
Connector Type Coaxial RG 174 2400 mm FME/F or SMA/M

GSM 850/900: 824 960 MHz

GSM 1800: 1710 1880 MHz

GSM 1900 / UMTS: 1920 2170 MHz

Dimensions 220 mm x 29 mm
Operating Temperature -40 C to +85 C
Impedence 50 Ohm
Max Power 30 W
Gain -2 to 5 dBi (5 dBi at peak)
Antenna Efficiency 24% ~ 46%
Magnetic Base Yes