Warm Tips: A neutral wire is required. Not compatible with homes without neutral wires (common before 1980). Supports single-pole only and 2.4GHz Wi-Fi only. Not for 3-way wiring or 5GHz networks. Standard-size smart switch; includes a 1-gang faceplate (5.07×3.34 in) and fits a 2.75×1.69×1.61 in wall box Stepless Dimming & Memory: Adjust brightness by sliding your finger on the switch, app control, or voice control. Remembers the last brightness after power-off. Works only with dimmable bulbs: max power LED 150W, CFL 150W, Halogen/Incandescent 400W. Not compatible with non-dimmable bulbs bulb with built-in remote or smart bulbs Enhanced Voice Control: No Hub required. The dimmer smart switch works with Alexa & Google Home Assistant(Not support Homekit) to conveniently control the light with the simple voice command while your hands are full or when it is dark in your room. Enable Treatlife skill to start this smart control Smart APP Remote Control: FCC certified for safety. Manage your house’s lighting via APP on your smart phone from anywhere at anytime. Ideal for when you're away from home or when you are sitting on your cozy sofa or comfortable bed Light Schedule & Group Control: Create schedules to automatically turn the light on or off with the preset brightness at specific times. You can also share the App with your family members to control the switch Introducing the TREATLIFE alexa light switch dimmer, your ultimate companion for hands-free light dimming with Alexa and Google Home Assistant. Experience the convenience of managing your home lighting from anywhere using the smartphone app, whether you're relaxing on the sofa or away from home, ensuring a comfortable ambiance at all times. Easily adjust the dimming range through the app or by using voice commands, giving you complete control according to your preferences. Even during power failures, the single pole dimmer switch will remember your last setting and restore it once power is restored. With the option to create schedules, you can automate the lights to turn on and off at your desired times with preset brightness levels. Moreover, sharing the app with family members allows them to control the switch on your behalf, giving everyone in the household the power to customize their lighting experience.