Shelly Dimmer 2

The Shelly Dimmer 2 is a WiFi smart dimmer that installs behind existing wall switches, adding intelligent dimming without replacing your switches or requiring neutral wire. This capability makes it one of the few smart dimmers suitable for older homes with two-wire switch configurations. The dimmer handles 200W of dimmable LED loads with trailing-edge dimming technology.

The device supports external switches in various modes including momentary, toggle, and detached, adapting to your preferred control style. Minimum and maximum brightness can be calibrated to ensure smooth dimming with your specific bulbs. The local API enables direct control without cloud dependency, while the Shelly app provides scheduling and automation features.

The Dimmer 2 integrates with Home Assistant through local API, with Amazon Alexa and Google Home available through Shelly Cloud. The no-neutral-required installation opens smart dimming possibilities for millions of homes that would otherwise need electrical upgrades. Temperature protection prevents overheating with high-wattage loads, and the compact size fits most electrical boxes worldwide.