Description: The gate opener relay switch is a device which can be used for authorized door access, controlling gates, switching of remote equipment, car parking systems by FREE CALL from your mobile phone. Support 3G and teltra network, frequency: 850/2100. Just dial from Authorized User number at the specified time then the Barrier and doors are opened, or the machine are turn on or off by the GSM Gate Opener/Relay Switch. The relay close or open time is programmable. Up to 999 authorized phone numbers can be configured at the specified time for access control; you do not need to provide a remote control or keys for different users. Multiple applications: Remote open/close swing/sliding gates, doors, shutters, garage doors, locks with a free call ; microwave, air-conditioner control; remote switch equipment, for example: street lights, solar power, motor, pumps, fans, etc. Specification: Material: Metal Size: Approx. 130x74x27mm/5.12x2.91x1.06 inch Digital Input: 2 NC/NO dry contact Digital Output: 1 Relay, 3A/240VAC SIM Card: Supporting 3V SIM Card Backup Battery: 3.7V/900mAH DC Power Supply: 12V input Max. 50mA/Average 50mA Power Consumption: 12V input Max. 50mA/Average 25mA Temperature Range: -20-+60 °C Relay Rating: 3A/240VAC Type: AU Package Includes: 1 Piece Main Device 1 Piece Antenna 1 Piece Power Supply 1 Piece User Manual