Features: 1Multifunctional Design: Equipped with 4G network, APP WEB temperature and humidity linkage, and SMS power outage alarm functions to meet different needs. 2Widely Used: SM2 WLTE EA 2 chanel 4G romote controller can be used as a relay switch, suitable for various scenes and equipment. 3Flexible and Convenient: Standard SIM card and antenna interface, easy to operate, easy to install and use, good using experience. 4Accurate Monitoring: Equipped with temperature and humidity sensor ports, with a wide detection range and real time accuracy. 5Aluminum Material: 4G GSM dual channel remote switch controller is made of aluminum material, durable, reliable, and long lasting. Specification: Item Type:2ChannelRemoteControlRelaySwitchProduct Material: AluminumWeight: Approx. 298g / 10.5ozUsage: RelaySwitchPower Consumption: Standby 12V 50mA, Maximum 12V 200mA4GFrequency (LTEFDD): B1/B3/B5/B7/B8/B20GSMFrequency: 900/1800 MHzSIMInterface: StandardSIMCardAntennaInterface: Standard SMA InterfaceTemperature and Humidity Interface: 1SensorPortTemperature Detection Range: -40 to 125Humidity Detection Range: 0 to100%Output Logic: Normally Open and Normally Closed Package List: 1 xRemoteController1 xPlug1 x User Manual2 xAccessories