https://www.aihomestyle.com/products/wifi-dimmer-module/ The smart wifi dimmer adjusts the brightness/ON/OFF of connected devices via phone app, voice control, or manually via the traditional dimmer panel. It is installed behind the traditional dimmer to make it become a smart dimmer. App control is synchronized with the manual switch. With just one phone, this wifi dimmer switch module will bring you a whole new experience about smart home. Types Of Wi-Fi Dimmer Module 1 Gang Wi-Fi Dimmer Module 2 Gangs Wi-Fi Dimmer Module 0-10V Wi-Fi Dimmer Module Advantages of Wi-Fi Dimmer Module App & Manual Dimmer Control After installation, the traditional smart dimmer module can be controlled by phone App. App control is synchronized with the manual dimmer switch. 0% - 100% Dimming Support up to 150W Triac dimmable LED lamps. Brightness can be dimmed from 0%-100%. Brightness Memory The brightness memory function is available for the last light setting when powered off. Compact Size & Easier Installation Easy installation and wire connection behind the existing dimmer switch. Keep the function of manual dimmer switches. Voice Control The smart switch dimmer also works with Amazon Alexa and Google Assistant. Remote Control & Scheduling Remote control your dimmer smart switch from anywhere via App. Quality & Warranty CE, RoHS approved by Authoritative Intertek test lab. 2 Years warranty. Accept customer customization for logo, color box, etc.