Please check the following before using this device:1. Your smartphone or tablet has been connected to a 2.4G WiFi that can access the Internet (5G WiFi is not supported yet) 2. Turn on Bluetooth on your phone 3. If you use an Android phone or tablet, the system must be version 4.0 or above. 4. When using an phone or , you must be to access the and download the APP 5. If your wireless router is set up with address filtering, please enter the router background to turn off the filtering function. 6. When using this device, it must be used in conjunction with a Zigbee gateway. Product instructions: 1 Search "Tuya Smart" in and major application markets 2. If prompted for permission during the installation process, please select Allow. 3 Register an account and log in to Tuya Smart APP 4 Follow the instruction manual for correct wiring. Installation with power on is strictly prohibited. 5 After completing the wiring, turn on the power. The device's default setting for incoming calls is