Overview: This GSM gate opener Features remote onoff switch by authorized phone free calls, which can be operated from anywhere, no distance limit, very convenient. Features: *Increased antenna control, more stable signal, security precautions no longer dropped. *85090018001900MHz quad bands, can work in the worldwide GSM networks. *No call charges. The GSM Relay Switch answers the call from authorized number then carries out the turn ONOFF action on the first "ring". *Secure Using callerID for identification, unknown callers are ignored. *Add or remove users by SMS Text command. *No need to provide a remote control or keys for different users. *Up to 200 authorized phone numbers can be configured at the specified time. *The relay action will return a SMS confirmation to the owner or authorized call in number, this function is editable by user. *The relay close or open time is programmable. *Multiple applications. (Gates, bollards, barriers, garage doors, shutters and access doors or machines). Specifications: GSM Frequency: 85090018001900MHz Digital Output: NCNO dry contact, 3A240VAC DC Power Supply: 924V DC2A Power Consumption: 12V input Max. 50mAAverage 25mA SIM Card: Standard SIM Card Antenna: 50 Ohm SMA Antenna interface Temperature Range: 20~+60 degrees C Humidity Range: Relative humidity 90percent Dimensions: Approx. 3.23*2.99*1.06in 82*76*27mm Package Size: Approx. 19.8*11.2*3cm 7.79*4.40*1.18cm Package Weight: Approx. 9.27oz 263g Package List: 1 * GSM Door Opener 1 * Antenna 1 * User Manual Card