The 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. Product Features (1) UV Slider 2 Light cartridge (1) UV Slider 2 White Viz Ring (1) UV Slider 2 USB-C Charging Cable Product Specifications 70 hours of run time on setting 1 (dimmest) 13 hours of run time on setting 3 6 hours of run time on setting 5 (brightest) 15 minute auto-off timer