This product is a wireless switch supports inching /self-locking mode. Users can add the device to the APP Smart life in order to remotely control connected or devices. In self-locking mode, customers can remotely turn on/off connected devices immediately. When in inching mode, customers can have two wiring ways to select, and you can set the inching time in APP. WIFi control model, no need to program. No matter where you are, you only need to download a APP to connect the wifi and control the cloud. RF mode, you can control the board with RF433 remote controller. Note:due to different production batches, there are differences in printing screen printing, which does not affect the use. Colour:Green Material:PCB Package Contents: 1 * Wifi Smart Switch Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.