Descriptions:  Smart Screen Display Switch With Temperature Humidity Two Way Single Control Work With Bluetooth Mesh Gateway.    Installation steps:  1. Use your fingertips to hold the position of the opening slot in the picture and open the button cover.  2. Connect according to the wiring diagram.  3. Use screws to fix the switch to the wall junction box and turn the strong current switch to the 'power on' position.  4. Reinstall the button cover, the installation is complete.    Specifications：   Material: PC;  Color: White;  Rated input: 220V~50Hz;  Wireless connection: BLE Mesh;  Rated load: ≤200W (2-way);  Load type: Energy-saving lamp/LED lamp/fluorescent lamp/incandescent lamp;  Protection level: IP30;  Temperature range: -9.9°C~50°C;  Humidity range: 5%~98%RH;     Package included：  1 X Switch,  2 X Screw.