Power Supply: USB - USB Rechargeable. It comes with a charging cable that charges from your computer, power bank or any device with a USB port.

Features: Waterproof Super Bright - Provides you with the visibility you need when riding in fog, day light, low light, and at night.It is bright enough to to keep you safe., Multiple Modes - It has several modes and can be used as an emergency flashlight. Use it when you"re running, jogging, cycling, changing a tire, night time activities.Use the Low Brightness at dusk, and switch to High Brightness at night. Use the Slow Flashing or the Fast Flashing for high-traffic roads.you can switch with the click of a button. Say goodbye to bulky bike lights with excessive wiring.