Description: Made of ABS plastic casing, weatherproof grade makes it easy to use the tail light in any weather. USB rechargeable with lithium battery built in. It only takes 2 hours to fully charge and has a runtime of 6 hours on the highest setting. Easy Mount and Removable adjustable silicone strap provided. Easily loosen and fasten, and no tools are required. This bike light set is versatile enough for cycling, hiking, camping, or any outdoor activity and can be used as emergency flashlight. This is great for cycling at night or in places where visibility and safety are concern. Providing 2 Lighting Modes--Red & Blue, Red & White Alternate Flash. The COB lamp beads provides more visibility. It is easier to additionally improve your safety in riding. This rear light can be used as an emergency flashlight, when you are running, jogging, hiking, camping and more. Specification: Material: Color: Blue + Red Light ; Red + White Light Size: approx. 6x2.5cm / 2.4x0.98inch Package Includes: 1 Piece USB Light 1 Piece USB Data line Note: Please allow 1-3mm measuring deviation due to manual measurement. Due to the different monitor and light effect,the actual color of the item might be slightly different from the color showed on the pictures.