Feature:1. Multifunctional Design: Equipped with 4G network, APP WEB temperature and humidity linkage, and SMS power outage alarm functions to meet different needs.2. Widely Used: SM2 WLTE EA 2 way 4G romote controller can be used as a relay switch, suitable for various scenes and equipment.3. Flexible and Convenient: Standard SIM card and antenna interface, easy to operate, easy to install and use, good using experience.4. Accurate Monitoring: Equipped with temperature and humidity sensor ports, with a wide detection range and real time accuracy.5. Aluminum Material: SM2 WLTE EA 2 way 4G remote controller is made of aluminum material, durable, reliable, and long lasting.Specification:Item Type: 4G Mobile Phone Access ControllerProduct Material: AluminumWeight: Approx. 296g / 10.4ozUsage: Relay SwitchPower Consumption: Standby 12V/50mA, Maximum 12V200mA4G Frequency (LTE FDD): B1/B3/B5/B7/B8/B20GSM Frequency: 900/1800 MHzSIM Interface: Standard SIM CardAntenna Interface: Standard SMA InterfaceTemperature and Humidity Interface: 1 Sensor PortTemperature Detection Range: -40 to 125Humidity Detection Range: 0 to 100%Output Logic: Normally Open and Normally Closed.Package List:1 x Remote Controller1 x Plug1 x User Manual2 x Accessories1 x Probe