Bring existing lighting up to date with the ENER-J Smart WiFi 2 Gang Dimmable Switch Module, a compact smart dimmer module that fits behind compatible switches for app, voice and manual control. Its ultra-mini format supports installation in 98% of standard switch boxes, making it a practical option for homes, offices and rental properties where replacing the visible switch may not be necessary. Brightness can be adjusted smoothly from 0% to 100%, allowing more precise control over everyday lighting scenes. The module works with the Smart Life and Tuya apps, and supports Alexa and Google Assistant for voice control. Dual-way control allows two-way switches to be upgraded without rewiring, while family sharing and group control make it easier to manage multiple switches together. It also restores the previous brightness level after a power outage, or can return to a preset level. Key features 2 gang dimmable switch module Ultra-mini design