NEUTRAL WIRE REQUIRED: Please make sure your electric box has a neutral wire (color in white) before purchasing. If you are not sure, please send us a photo of the inner part of your electric box. We can check it for you timely. You can install the 3 way switch in either of the box. In addition, Meross smart light switch is equipped with a ground wire (color in green) to make it quite safe.
ONLY ONE SMART 3 WAY SWITCH NEEDED: Are you still worrying about replacing all the traditional 3-way switches? Don't worry, Meross can help you save your money and time. With the patented design of Meross, you only need to replace one traditional 3 way switch. But pay attention that MSS550 smart switch is only suitable for 3-way instead of single-pole installation. Meross light switch fits for your exsiting 1/2/3/4 gang standard size Decora/GFCI faceplate.
VOICE CONTROL AND APP REMOTE CONTROL: The smart Wi-Fi switch works with Amazon Alexa, Echo, Echo Dot, Google Assistant, Google Home and IFTTT so that you can turn on/off light with voice command for a hands free experience. Using the Meross APP to control your light from anywhere with your smartphone (iOS and Android). Only supports Meross APP.
AUTOMATIC SCHEDULE AND TIMER SETTINGS: You can create schedules (timer or countdown) to turn on/off your light automatically based on your routine. Schedule your lights when you need them including sunrise and sunset, and easily create fun lighting scenes. The Meross 3 way switch works with the 2.4G WiFi only, no hub required. (It does not support 5G wifi. But normally if you have 5G wifi, you should also have 2.4G wifi as a dualband.)
WARRANTY AND TECHNICAL SUPPORT: The switch housing is made of PC fire-retardant material so as to protect against electricity overload. Meross smart 3 way light switch is certified by FCC/ ETL and meets all safety and quality requirements. We offer 30-day money back, 1-year quality warranty and lifetime after-sale technical support. If you have any questions about your switch types, installation or Wi-Fi connections, please feel free to contact us and we will give you a satisfactory solution.