Feature: 1. Powerful and Smart Controller: The GSM gate opener is a powerful relay that enables simple authorized access control to doors, remote equipment changes, and parking system management. 2. Remote Operation: This GSM gate opener offers a remote on and off switch operated without authorized calls, offering operational convenience from any location without any distance limitations. 3. Global Network Compatibility: With its Quad Band 850/900/1800/1900 MHz capability, it can work within the global GSM network, providing worldwide accessibility. 4. Secure: No call charges as the GSM relay switch answers the call from the authorized number performing open and close operations, and the secure caller ID recognition ignores unknown calls. 5. Wide Application and High Capacity: It is suitable for doors, bollards, obstacles, garage doors, shutters, access doors, or machines, can set up to 200 authorized phone numbers at designated times. Specification: Item Type: GSM Access ControllerModel: RTU5024 GSM Frequencies: 850/900/1800/1900 MHz Digital Output: NC, Dry Contact Power Supply: DC12-24V SIM Card: Standard SIM Card Antenna: 50Ω SMA Antenna Interface Temperature Range: -20~+60°C Humidity Range: 90% Relative Humidity . Package List: 1 x GSM Access Controller1 x Antenna1 x Manual