Fabric Lumacell USB Rear LightThe Fabric Lumacell USB Rear Light is a waterproof 20 lumen rear that is super easy to charge. At max power this little light puts out 20 Lumens of bright red light to make sure you are seen. There are many options for placement thanks to the Multi-position mount. Charges in a standard USB port. This tough nylon base has IPX5 water proofing. At max power this light lasts 2.5 hours. At medium power this light lasts 4 hours. At low power or flash mode this light lasts 8 hours.038675137233