3 Way Smart Switch, Meross Smart Light Switch Supports Apple Homekit, Siri, Neutral Wire Required: Please make sure your electric box has a neutral wire(in white color) before purchasing 3 way smart switch. If you are not sure, please take a photo of the inner part of your electric box and send it to us. We can check it for you timely. (NOT DIMMER) Affordable and Easy to Install: With meross?s patent designed 3 way smart wireless light switch, you only need to replace one traditional 3 way switch. Half cost and labor. 15 mins installation. meross smart light switch fits for your existing 1/2/3/4 gang standard size Decora/GFCI faceplate. Works with the 2.4G Wi-Fi only, do NOT support 5G Wi-Fi, no hub required. Voice and Remote Control Light Switch: Control your light from anywhere with internet anytime by smart switch. ONLY supports meross app. Works with Apple Homekit light switch, Apple Watch, Siri, Alexa, and Google Assistant. You can give simple voice commands to turn on/off the devices that are connected to smart switch light 3 way. All data is securely transmitted and stored with AWS servers in US. Timer Light Switch and 3-way Application: Smart 3 way switch supports to turn on and off the light automatically. Added benefit of saving energy when lights are not needed or are left on by accident. Support sunrise and sunset setting. Using it as 3 way meross smart switch to control the same light from 2 locations. Smart design for top and bottom of a stairs, for large rooms with multiple entrances, etc. Technical Support: 3 way light switch housing is made of PC+ABS fire-retardant material. Protection against electricity overload. If you have any questions about your switch types, installation or Wi-Fi connections, please contact us, we will give you a satisfactory solution. User-friendly Smart Switch for Android Users: Meross smart switch works with any Android smartphone or tablet with OS 4.1 or higher. Android users will have an effortless experiences when configure with Meross app. Then skill 'meross' with your smart speakers as you wish.