Frequently Asked Questions Switch Frequently Asked Questions Does it need a neutral line? How could I know whether there is a neutral line？ Yes, it needs a neutral line. The best way is to check the actual wires in the switch box, the neutral line is often going to be colored white, but it also may be other colors. If there are multi-gang switches, that has a much higher likelihood of having neutrals. If there is a wall outlet near the switch, most likely that switch box has a neutral. If your house was built in the mid-1980s or later, there is an excellent chance that you have neutral lines in the box. Learn how to install our switch(es) efficiently, please check the below YouTube video link: https://youtu.be/Fflvy4I7M6I Learn how to distinguish wires, this video is for your reference: https://youtu.be/qyAPIui38HE Suggestion: It's better to make marks with label stickers for wires before removal and replacement. What is the difference between the single-pole switch, dimmer switch, and the 3-way switch? The single-pole switch is designed to turn on/off the light at only 1 place, but could not control the fan speed or light brightness. The dimmer switch is designed to turn on/off the light at only 1 place, besides, it also could control the fan speed or light brightness. The 3-way switch is designed to turn on/off the light at 2 places, but could not control the speed and brightness. The 3-way switch also could be used as the single-pole switch. I have a dual wifi router, How could I use it? Our smart devices require a 2.4g wifi channel during the initial connection to the app. After a successful connection, you may enable the 5G and the smart devices should work fine. Please double check these steps to make sure you are on the 2.4g as a requirement during the initial connection of the device to the app. Enter the "Wireless Settings (Wireless)" page of the router (the access method is usually on the label at the back of the router). Find the 2.4Ghz settings page,