[Single fire switch] No neutral wire is required, easy to install. Specially used for renovation of old houses. [WiFi+RF433] This switch has RF433 function, which is more convenient to control with remote control. [2 in 1] Can control the opening and closing of the fan, and can also control the opening and closing of the light. The switch cannot control the speed of the fan, but can only control the opening and closing of the fan. [APP remote control] Control the switch anytime and anywhere through the mobile phone APP [Set timing and countdown] Turn on and off the fan or light at the set time, and you can also set a countdown to turn off the fan and light. Warm tips: 1. For indoor use only. 2. This product does not have Type-C. 3. The switch cannot adjust the speed, cannot control the direction, and only supports on and off 4. It does not support fan lights, but supports exhaust fans, ceiling fans, and old-fashioned fans. 5. No neutral wire is required, and the capacitor is installed at L1, not behind the switch but at the position of the light. See the installation picture for details. 6. Support 2.4GHz Wi-Fi and Bluetooth, but not 5GHz. 7. This switch has RF433, and you can control it with a remote control. 8. When the switch is powered on, do not cover the glass panel with a cover. When the glass panel is covered when powered on, the switch not work. Please restart the main power switch and it work. 9. The countdown function can be used for fans and lights separately 10. Bluetooth is only used for network signal connection and cannot be used alone. WIFI+Bluetooth is more stable Product parameters Relay: 10A Voltage: AC 110~240V 50/60Hz Rated power: lamp 3-500w/Gang; fan 150w Max Maximum operating temperature: 0°C~40°C Wireless frequency: 2.4GHz Size: 8.6 x 8.6 x 3.88cm (WIFI+ single fire-1 fan 2 lights) Color: Black Material: ABS+PC Package Contents: 1 * Smart switch 1 * RF433 remote control 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.