Ascher Ultra Bright USB Rechargeable Bike Light Set, Powerful Bicycle Front Headlight and Back Taillight, 4 Light Modes, Easy to Install for Men Women Kids Road Mountain Cycling

Rechargeable Bike lights: USB rechargeable front and back lights, built in 2000 mAh rechargeable lithium battery for headlight and built in 330 mAh rechargeable lithium battery for taillight.
Four Light Mode Options: The headlight and taillight feature an one-touch switch with four different lighting modes depending on your preference. Include full brightness, half brightness, slow flashing and fast flashing.
Advanced Design: With simple structure and lightweight, our bicycle lights are easy to carry. Rated IPX4 waterproof. The indicator of headlight turns red, when the battery power is too low.