Dimensions: 53 x 22 mm, weight: 16.5 g. ABS housing, PC lens, standard USB plug. Uses high-efficiency LED chips to ensure hours of continuous lighting. USB Rechargeable: With the built-in rechargeable lithium battery and USB interface, it can be fully charged via the USB port of any device. Save space and avoid the hassle of losing and storing the charging cable. Easy to Use: The kids flashlights are equipped with a rotary switch. You just need to turn the "OFF/ON" end of the flashlight to turn on the flashlight and turn the end counterclockwise to turn on the USB charging. Even children can use it without any problem. Easy to Carry: The mini USB flashlight comes with a key ring and a non-slip case, making it less likely to fall off. The waterproof keychain flashlight is small and easy to carry. You can put it in your pocket or hang it on your keychain or bag. Wide Use: This mini LED flashlight is suitable for almost all scenarios such as outdoor, hiking, night fishing, running, night walks, power outages, etc. The mini flashlight is a perfect gift for boys and girls, family, and friends.