ROMOTE CONTROL & VOICE CONTROL - Wifi smart switch can work perfectly with -enabled devices like /Tap/Dot, as well as for home. Just with a simply voice , or for Assistant work , turning on/off the connected devices at once. EASY SETUP - Just plug in the usb cable, download the Smart Life/Tuya App on or for store and register an account, then follow the instruction to complete the wifi configuration. DEVICE SHARING - DIY Your Smart Home, Support Remote turn on/off, Timing Schedules , Device Sharing, Easy to Share, All family can control home appliances through Smart Life/Tuya app Works from anywhere you have internet connection. DEVICE MODE CHOOSE - This wireless switch supports inching /self-locking mode. In the Self-locking mode, when you the button on APP (or the manual button on the board) for one time, the relay be on. The relay be off only when you the button . DIY SWITCH MODULE - It can let you DIY a lot of smart projects: smart lights, fans, garage door, humidifier, thermostat etc. Colour: black Material: plastic Package Contents: 4 x Switch Module 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.