Overview:This GSM gate openerFeatures remote on/off switch by authorized phone free calls, which can be operated from anywhere, no distance limit, very convenient.Features:*850/900/1800/1900MHz 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 ON/OFF action on the first ring.*Secure _ Using caller_ID 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:Model: G202GSM Frequency: 850/900/1800/1900MHzDigital Output: NC/NO dry contact, 3A/240VACDC Power Supply: 9_24V DC/2APower Consumption: 12V input Max. 50mA/Average 25mASIM Card: Standard SIM CardAntenna: 50 Ohm SMA Antenna interfaceTemperature Range: _20~+60 degrees CHumidity Range: Relative humidity 90%Item Size: Approx. 10.3 * 5 * 3.1cm / 4.1 * 2 * 1.2inPackage Information:Package Size: Approx. 11.5*6.3*4cm / 4.5*2.5*1.6cmPackage Weight: Approx. 97g / 3.4ozPackage List:1 * GSM Door Opener1 * User Manual Card?