This device has 2 independent relay switches. 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.
All relays can be controlled via a single SMS if required, and all relays can be turned on for a set amount of time via an SMS. FDD LTE: B2 / B4 / B12.
WCDMA: B2 / B4 / B5. 200 mm x 125 mm x 82 mm (7.87 inches x 4.92 inches x 3.23 inches).25 C to +60 C, -12 F to 140 F. 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. The device can be conveniently mounted under the dash!
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.Are included but can be added on in some cases (with additional cost). This device does NOT come with a SIM chip. Add a map to your own listings. This device only operates in the USA, Canada, and Mexico. Free iOS and Android Mobile Apps! Android and iOS apps are freely available to assist in programming and controlling your device. 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. 220 mm x 29 mm. 40 C to +85 C. 2 to 5 dBi (5 dBi at peak). The item "4G GSM High Amperage Remote Control Relay DC Powered USA/Canada/Mexico" is in sale since Friday, January 20, 2017. This item is in the category "Consumer Electronics\Surveillance & Smart Home Electronics\Other Smart Home Electronics". The seller is "relay-supply" and is located in Saskatoon, Saskatchewan. This item can be shipped worldwide.