The Lutron DV-603P-WH 600W 3 Way Preset Dimmer is a white rotary switch designed for controlling the brightness of a room. With a voltage range of 101-120 VAC and a frequency of 60Hz, this dimmer is suitable for use in any room of the home. The Lutron brand is known for its quality and reliability in electrical supplies, making this dimmer a trusted choice for any home improvement project.