Feature:1. Remote Control: GSM door opener with remote switch for authorized free calls that can be operated from anywhere, regardless of distance.2. Stable Efficiency: Quad band 900 or 1800Mhz for global GSM networks, you can control the device and receive alarm messages at any time.3. Professional Design: Gate opener module provides high signal sensitivity, anti interference and good stability, bringing you a professional use experience.4. Practical Switch: Excellent aluminum housing and system safety isolation, durable construction and reliable performance, ideal as a control switch.5. Wide Application: Suitable for a variety of scenario applications, such as farming agricultural power equipment, factory automation, base station lighting, etc.Specification:Item Type: GSM Gate OpenerMaterial: Aluminum4G Frequency: B1 or B3 or B5 or B7 or B8 or B20GSM Frequency: 900 or 1800 MHZSIM Interface: Standard SMA interfaceOutput: Normally on and normally off.Package List:1 xRelay Switch1 x User Manual1 xSignal Receiving Line1 x Plug