Overview:This GSM gate opener features remote on/off switch by authorized phone free calls, which can be operated from anywhere, no distance limit, very convenient.Features:1. Support global 2G 3G 4G communication frequency2. Support authorized 1001 user numbers. Support to query the number authorized by yourself3. Support 9-36V wide voltage input4. Support relay delay closing time 0-999 seconds5. Support the relay to be permanently closed until the next command interrupts the closure6. Authorization protection, support whitelist and blacklist7. Support remote restart, remote reset8. Support one-click query of all numbers9. Support query device status10. Support query signal value11. Support authorized number to call in and SMS to control the deviceSpecifications:Model: G203Digital Output: NC/NO dry contact, 3A/240VACDC Power Supply: 9-24V DC/2APower Consumption: 12V input Max. 50mA/Average 25mASIM Card: Standard SIM CardAntenna: 50Ω SMA Antenna interfaceTemperature Range: -20~+60°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