Description: 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/tuya" APP in your smart phone to control the switch wirelessly with Wi-Fi or 4G network.no hub required. 3.Timing Function:Take full control of your home or office lights thanks to schedule timer that will allow you to plan the exact time to turn lights and appliances on/off automatically 4.Share Device:This samrt switch can have several control sites shared by different family members.one mobile phone can control many switches also. Q&A Q:How do I set the light to fast flash? Turn on the device, turn off the power after 10 seconds, and then turn on the power again. Long press the operation button 10 seconds. Confirm the indicator rapidly blink. Q: How do I set the light to slow flash? Turn on the device, turn off the power after 10 seconds, and then turn on the power again. Long press the operation button 10 seconds. Confirm the indicator rapidly blink. Long press again the operation button for 10 seconds until the light flashes slowly. Note: The new device will take 1 minute to connect to Wi-Fi and the Internet, and if it's not connected for a long time, please check your Wi-Fi status. Q: After adding the device successfully, shows is offline and out of control? It may be that the Wi-Fi password was entered incorrectly. It may be that the device is too far away from your router, that the signal is too weak, or that there is interference around. Check that MAC address filtering is turned on in the base of your router and, if so, please turn it off. Specifications: 1. Working voltage: AC90-250V 60HZ/50HZ 2. WIF: IEEE 802.11 b/g/n 3. Maximum current: 4. Size:90*38*22(mm) Package Included: Smart Light Switch*1 Manual*1