11. Support global 2G 3G 4G communication frequency 22. Support authorized 1001 user numbers, support querying your own authorized numbers 33. Support 9-36V wide voltage input 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 frequency 2. Support authorized1001 user numbers, support querying your own authorized numbers 3. Support 9-36V wide voltage input 4. Support relay delay closing time 0-9999 seconds 5. Support the relay to be permanently closed until the next command interrupts the closure 6. Authorization conservation, support whitelist and blacklist 7. Support remote restart, remote reset 8. Support one-click query of all numbers 9. Support query device status 10. Support query signal value 11. Support authorized number to call in and SMS to control the device 12. Support authorized ordinary users (only for closing and closing relays, querying relays, and querying signals) 13. Support adding additional users to receive notification pushes, without occupying the quota of authorized numbers Specifications: Model: G203 Digital Output: NC/NO dry contact, 3A/240VAC DC Power Supply: 9-24V DC/2A Power Consumption: 12V input Max. 50mA/Average 25mA SIM Card: Standard SIM Card Antenna: 50 SMA Antenna interface Temperature Range: -20~+60C Humidity Range: Relative humidity 90% APP: callny control Item Size: Approx. 10.3 * 5 * 3.1cm / 4.1 * 2 * 1.2in Package Information: Package Size: Approx. 11.5*6.3*4cm / 4.5*2.5*1.6cm Package Weight: Approx. 97g / 3.4oz Package List: 1 * GSM Door Opener 1 * User Manual Card 1 * GSM Door Opener 1 * User Manual Card