Features: 1Versatile Design: Equipped with 4G network and APP WEB temperature and humidity linkage, this device serves as a multi functional 4G temperature and humidity alarm system. 2Aluminum: Temperature humidity alarm is made of sturdy aluminum material, ensuring long lasting and dependable performance. 3Wide Range of Applications: Ideal for controlling relay switches and especially suitable for industrial control applications. 4Convenient and Flexible: Features standard SIM card and antenna interface, making installation and usage quick and easy. 5Accurate Monitoring: Provides real time and accurate temperature and humidity detection through the built in sensor ports. Specification: Item Type: GSMGateOpenerMaterial: AluminumWeight: Approx. 560g / 19.8ozProduct Model: SM8 WLTE EAApplication: Relay SwitchPower Consumption: Standby 12V 50mA, Maximum 12V 200mA4G Frequency (LTE-FDD): B1 B3 B5 B7 B8 B20GSM Frequency: 900MHz 1800MHzSIM Interface: Standard SIM CardAntenna Interface: Standard SMA InterfaceTemperature and Humidity Interface: 1 Sensor PortTemperature Detection Range: -40-125Humidity Detection Range: 0-100%Output Logic: Normally Open and Normally Closed Package List: 1 xGSMGateOpener1 x Control Board1 x Plug1 x User Manual3 x Accessories1 xPT100TemperatureSensor