The Shelly Pro Dimmer 1PM is a professional light dimmer with two channels, power measurement, and free data storage. It installs on a DIN rail and controls, dims, and measures power for halogen lights, dimmable LEDs, and ferromagnetic transformers (110-240V). It features automatic dimming calibration and includes switch/button input mode, smart scenes, no hub required, and works as a Wi-Fi range extender and BLE gateway. Brightness that suits your activities - Shelly Pro Dimmer 1PM gives you fine-tuned control over your lighting. Set minimum and maximum brightness levels to match your preferences and your bulbs' capabilities. Additionally, pre-set preferred lighting scenes for different activities and moods. Optimized energy consumption - The Shelly Pro Dimmer 1PM is ideal for dimming and power metering in homes, hotels, and offices. Designed for DIN rail integration, it allows precise light control and monitoring across rooms, helping you plan expenses and optimize energy.