The Armacost Lighting Proline LED Controller for CCT Tunable White LED Lighting features a new, sleek and ergonomic design with soft-touch, positive click buttons. Made specifically for use with RibbonFlex Pro Tunable White LED Strip Lights and Tunable Under Cabinet LED Puck Lights, the LED controller adjusts white color temperatures between 2700K warm white and 5000K daylight white, and dims LED lights from 100% to 0% brightness. The Radio Frequency (RF) remote control works through cabinets, doors, and walls from up to 50ft away and allows you to save up to four favorite color temperature and brightness level settings. The 2C terminal block receiver and CCT remote controller can be paired with multiple tunable white lighting installations. Not compatible with 120V dimmer switches.