Feature: 1. Advanced Features: This relay switch comes with a power loss function, 4G network remote control, temperature and humidity monitoring, and power outage alarm capabilities. 2. Multi Channel Sensor Support: The device provides support for two temperature and humidity sensor ports, making it widely applicable in various environmental conditions. 3. Flexibility in Usage: With four relay channels, the remote controller supports 10A or 15A output logic. This flexibility in functions ensures that the device can handle a variety of situations efficiently. 4. Convenient Networking: From supporting standard SIM cards to having extensive coverage of 4G and GSM frequencies, this relay switch ensures convenient networking. Seamlessly controlled via a mobile APP or web, it offers user friendly operation. 5. Aluminum Material: The GSM remote control relay switch is made from aluminum material ensuring its stability and durability. Its robust construction means it can stand up to constant use and last for a long time. Specification: Item Type: GSM Remote Control Relay Switch Material: Aluminum Weight: Approx. 433.00g / 15.27oz Power Consumption: Standby 12V 50mA, Maximum Work 12V 200mA 4G Frequency (LTE FDD): B1 B3 B5 B7 B8 B20 GSM Frequency: 900/1800Mhz SIM Interface: Standard SIM Card Antenna Interface: Standard SMA Interface Temperature and Humidity Interface: 2 Sensor Ports Temperature Detection Range: -40 to 125℃ Humidity Detection Range: 0 to Full Output Logic: Normally Open and Normally Closed. Package List: 1 x Remote Controller 1 x Plug 1 x Instruction Manual 3 x Accessories