GSM 4-Channel Door/Gate Opener — GSM Mobile Phone Remote Relay Controller Intelligent Switch with Power-off Memory

4 Channels of remote control packed into a GSM-enabled relay controller designed for door and gate operation as well as general appliance management. With All-weather wireless remote GSM control, you can operate connected devices from anywhere that has GSM network signal coverage. The unit features power-off memory to retain relay states after a power interruption. Built for safety and durability: the enclosure is made from aluminum alloy engineering material while the high-current electrical components are housed in flame retardant plastic to help prevent fire hazards. Security options include a private password and the ability to set up to 5 groups of master numbers simultaneously so only authorized master numbers can control the device by password. Broadly compatible — suitable for household electrical appliances and many industrial and network uses, including servers, desk lamps, floor lamps, various home appliances, televisions, stereos, wireless routers, high power AC motor, remote base station, PBX switchboard, water pump, router, server.