Features: 1Remote Control: The GSM gate opener comes with a remote on off switch for authorized calls for free calls which can be operated from anywhere without distance restrictions. It operates with a frequency of 850 900 1800 1900 MHz making it suitable for GSM networks worldwide. 2High Performance: The GSM remote controller is built with a metal casing and IP30 protection rating. It is specifically designed for industrial control applications providing a secure isolation system. 3Unlimited Distance Control: With GSM control you can control the device anytime and anywhere and receive alarm notifications at any time and from anywhere globally. 4Wide Application: Relay controller is suitable for various scenarios and applications such as farming and agricultural power equipment factory automation base station lighting urban appearance etc. 5Compact Size: The GSM door opener is very compact making it a perfect gift for friends or family members with a similar need. The small size adds to its convenience portability and easy installation. Specification: Item Type:RelaySwitchMaterial:AluminumGSM Frequency: 850 900 1800 1900MhzSIM Interface: Standard SMA interfaceOutput: Normally On and Normally OffWeight: Approx. 371g/13.1oz Package List: 1 xRelaySwitch1 x Manual1 x SignalCable1 x Plug