Easy to Install: Neutral wire required (homes built before the 1980s may not have one). Works with 2.4G Wi-Fi only (not 5G). Install the Treatlife smart dimmer on the line/load side, and the other switch must be a standard 3-way (not a smart switch). Works only with dimmable bulbs. Max load: 150W LED, 150W CFL, 400W incandescent Master 3-Way Setup: Only one Treatlife 3-way dimmer is required per 3-way circuit. Replace just one of the two existing 3-way switches and keep the other as a standard/dumb switch. Includes two main switches that can be used independently in different locations. Can be used as either a 3-way or single-pole switch 1%-100% Brightness Adjustable and Voice Control: No hub required. Slide a finger up or down to adjust the light brightness without clicking noise. Compatible with Alexa, Google Home, and SmartThings but not Apple Homekit. The voice assistant make it easy to control and dim all the lights with voice commands. This smart light switch can memorize the last brightness setting to help you get the most comfortable light after powering on APP Remote Control and Schedule: Remotely control the lights in your home via APP on your smart phone for security purposes and convenience. Create schedules to automatically turn lights on or off at preset brightness based on your daily routine. App Remote and scheduling works great as well for when you're on vacation Reliable Technical Support: FCC Certified. Flame-retardant material and built-in overheat protection for safety. If you have any questions about installation or any other aspect, feel free to contact our Treatlife team, we will help you timely and give you full guidance The Treatlife switch includes clear instructions that are fairly easy to follow based on it. You can replace one of the two 3-way dimmer switches and leave your other existing 3-way switch in place. No requirement of hub and it works well with 2. 4G WIFI only and not 5G. Please install the Treatlife switch on the line side (the source of power) and the 3-way switch on the other end needs to be a standard/dumb 3-way. The smart dimmer switch is only for dimmable bulbs. It comprises two main switches that can be used independently. You can install one to replace a current 3-way setup hallway and use the other one in a bedroom. It controls the dimming of 1 light from 1 or 2 places and can be used as a 3-way or single-pole switch. Compatible with Alexa and Google Home, you can control easily and dim all the lights with voice commands. You can slide a finger up or down to adjust brightness without clicking noise. With the help of a smart light switch, we can memorize the last brightness setting to help you get the most comfortable light after powering on. It has a good compatibility with SmartThings but not Apple Homekit. When you are on vacation, the app remote and scheduling works great. Via app, it controls the lights in your home on your smartphone for security purposes and convenience. Based on your daily routine, it creates schedules to automatically turn lights on or off at preset brightness. This switch is FCC-certified. For safety purposes, it has flame-retardant material and built-in overheat protection. It has a warranty of 1 year. If you have any questions about installation, use, or any other aspect, please contact our Treatlife team, we will check it for you timely and give you full guidance