This smart wifi module with mini design suits for wall switch box,and easily hide it into your hidden wall switch box of your traditional switch without any influences on your original decoration style to smart.More importantly,your traditional switch and this smart module can work independently under non-interfering mode. [DIY Smart Home]The smart relay switch module is great for retrofitting existing home devices,such as lamps,fans,sockets,xmas lights,gas fireplace,outdoor garden light,garage door opener,etc. [ & Schedule] and Countdown Setting . Another feature available if to set timing schedules for the appliances, which can include countdown, scheduled on/off .It's simple,giving you one less thing to worry about in your busy life.Control your devices at will to automatically turn on/off. [Hands-free Voice Control ]Free hands via easy voice control with for Alexa and for Googel Home.Compatible with for Alexa & for Home, the smart switch allows you to control lights on/off with your voice. Various control methods are compatible with traditional switches, and you can set the switching state of the input module. Output: AC 100-240V 50/60Hz Input: AC 100-240V 50/60Hz Wireless network: IEEE 802.11b/g Maximum current: 16A functions: 1. Convert ordinary non-intelligent appliances or devices into intelligent devices 2. Mobile phone APP control 3. Voice control 4. Timing control 5. Group control 6. Internet of Everything. 7. Home sharing and security 8. Bluetooth fast matching 9. State memory 10. WiFi connection, no gateway required. Colour:White Material:ABS Package Contents: 1 x Mini 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.