Advanced PWM Technology: Utilize cutting-edge Pulse Width Modulation (PWM) technology to smoothly adjust the brightness of your lights in RVs, campers, and boats, ensuring optimal lighting and energy efficiency Integrated QC 3.0 USB Port: Features a Quick Charge 3.0 USB port to charge your mobile devices, making it a versatile addition to your electrical setup High Capacity & Reliability: Supports up to 5A of current, suitable for a wide range of lighting applications, while ensuring durability and reliability in environmental conditions Easy Installation: Designed for hassle-free installation, this dimmer switch can be easily integrated into your existing electrical system, providing immediate enhancement of your lighting control capabilities Due to different batches, there may be differences in product appearance and printed text, which not affect use Color:Black Material:Plastic Package Contents: 1 * DC 12-24V PWM Dimmer Switch Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.