Dimmable Fill Light - Press the dimmer button to change the light color: Warm Light, Cold Light, Natural Light. Long press the button to adjust the brightness from 1% to 100% to suit the needs of different situations. USB Powered - No battery required, can be used with most devices that support USB ports, such as: Laptops, PCs, power banks, USB chargers, power adapters, etc. 90 minutes of charging, 60 minutes in single-light mode, 30 minutes in dual-light mode (brightest gear) Easy to Carry - Pocket-sized, it doesn't take up any space in the school bag. Just connect your phone, iPad or laptop to capture high quality pictures and videos of every important moment in your life. Compatibility - As long as your device is less than 0.59in (15mm) thick, our selfie light is suitable for almost all cell phones available on the market. Multipurpose -You can take videos at night or take selfies in dark places and also use them as flashlights, emergency lights, fill lights, makeup lamp and more.