Leviton Dimmers help in 3 ways: 1. Create lighting ambiance 2. Save money by saving energy 3. Pro-long bulb life.; Rotary on-off dimmer is rated to 600 Watts 120V AC 60Hz Only; Ultra compact design fits in tightest wall box and easily replaces any single pole light switch.; Complete with wiring instructions; UL Listed, CSA Certified;