The Ultraview UV Slider Light Cartridge is USB rechargeable and boasts 5 brightness settings. The compact design cuts down on weight and creates a perfect fit with UV Slider 2. Features70 hours of run time on setting 1 (dimmest)13 hours of run time on setting 36 hours of run time on setting 5 (brightest)15 minute auto-off timer Includes(1) UV Slider 2 Light cartridge(1) UV Slider 2 White Viz Ring(1) UV Slider 2 USB-C Charging Cable