The smart wifi switch are Certificated. To control this -enabled accessory automatically and remotely requires a , TV, or set up as a bridge. It is recommended that you update to the latest software and . If you 't have these devices, you can use app to control the device anywhere and anytime with more function. 2.4GHz wifi supported and no hub required. The smart WiFi switch helps you control home devices with voice and hands-free via or Google Home Assistant. given a simple voice , it will switch on/off light or other devices(Note: Not dimmable). That brings you the charm of the smart switch other than handwork The smart relay switch module is great for retrofitting existing home devices to improve levels of control to home automation,such as ,fans,sockets,xmas lights,DIY smart mirror project,gas fireplace,outdoor garden light,garage door opener,candle warmer,etc.(Warm Reminder:Installation is easy with basic electrical .) Enjoy your customized schedule to automatically power on or off any electronic device. Such as turn on the light in the morning and turn it off at night, disconnected the pone within 30 minutes and so on. smart switch is widely applicable and can be applied to 97% household appliances and , as long as the phone has network , users can remotely turn the connected home appliance on/off from anywhere at any time. material: plastic Color as shown Package Contents: 4pcs Outlet Switches 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.