No Neutral Line requiredSupport single fire system. Support Neutral system and No Neutral system, but you need a capacitor when you use No Neutral system, capacitor is included. Wi-Fi direct connectionNo gateway hub is required, just install it and use it. Directly connect to the Internet, you can control with your mobile phone to realize smart life. (Need 2.4GHZ) APP remote control Tuya or smart life APP can be used to remotely control the switch on and off. You can see the open or closed state of the switches from the APP when you are away. Link with other smart devicesIt can be connected to other smart devices to realize a convenient smart life together. A home mode can be created and linked with other smart devices to automatically turn on the light as soon as you go home. Support voice speaker control The switch is compatible with Alexa and Google Home Assistant, allowing you to use the voice control smart switch to turn on/off.