Features: 1Remote Control: GSM door opener with remote switch for authorized free calls that can be operated from anywhere regardless of distance. 2Stable Efficiency: Quad band 900/1800Mhz for global GSM networks you can control the device and receive alarm messages at any time. 3Professional Design: Gate opener module provides high signal sensitivity anti interference and good stability bringing you a professional use experience. 4Practical Switch: Excellent aluminum housing and system safety isolation durable construction and reliable performance ideal as a control switch. 5Wide Application: Suitable for a variety of scenario applications such as farming agricultural power equipment factory automation base station lighting etc. Specification: Item Type:GSMGate OpenerMaterial: Aluminum4G Frequency: B1/B3/B5/B7/B8/B20GSM Frequency: 900/1800 MHZSIM Interface: Standard SMA interfaceOutput: Normally on and normally off Package List: 1 xRelaySwitch1 x User Manual1 xSignal Receiving Line1 x Plug