Features:  1. Smart Zig Bee 3.0 Light Dimmer Switch: Compatible with Echo Plus, Smartthings hub and Wink hub. Adjust the Brightness Via Your Voice Assistant or Phone.  2. Remote Control and Smart App Control: Support Smart App Control to remotely control on smart phone. One of the above Zig Bee hub is required.  3. Voice Control: Control lights and home appliances through Amazon Alexa to freely voice control your lights,as long as there is stable Zig Bee signal.  4. Considering the status of unstable network or no network, Zig Bee 3.0 switch is really an irreplaceable must to combine with Zig Bee gate way to form a home LAN, NO MORE WORRY about no network. You are able to freely control the appliances and enjoy a much more free lifestyle.  5. Family Sharing: Share the control with your family members or friends.Support multiple phones to control one switch or one phone to control multiple switches at the same time.     Specification:  Size: 12*5*3.5cm;  Housing material: PC;  Rated voltage: AC100-240V;  Rated current: 10A;  Start mode: button control, phone control;     Q&A:  1. Q: Is it compatible with Google Home?                                                                      A: Yes, what you need to do is to connect your Google home to SmartThings or other hubs, and then you are able to control via Google Home, as well as Alexa.  2.Q: Do I need a hub to work with the switch?     A: Yes, zig bee hub is a must for the switch to work normally. Zig Bee 3.0 switch supports smartthings hub, Echo Plus hub and Wink hub.  3.Q:Can the controller work with WiFi?     A:No, it only supports Zig Bee protocol.No WiFi supported.     Package included:  1 x Zig Bee 3.0 Smart Dimmer Switch Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.