1.Voice control:once you have this switch,you can connect it with Amazon Alexa(Amazon echo/dot/tap) or Google Assistant for voice control. 2.Wi-Fi Remote Control:You can use "Smart Life" APP in your smart phone to control the wall switch wirelessly with Wi-Fi or 4G network.no hub required. Specifications: WiFi Smart Curtain Switch Smart Life Tuya for Electric Motorized Curtain Blind Roller Shutter Works with Alexa and Google Home Colour:White Material:PC + Tempered glass Size:86*86*3.5mm Package Contents: 1* Smart Switch 1* Srew Bag 1* User Manual Only the above package content, other products are not included. Note: Light shooting 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.