REAR BIKE LIGHT – Our B2 features 36 COB LEDs with a real, lab-tested output of 110 lumens, a 150-degree beam angle, and 150m visibility for enhanced safety. 5 STYLISH LIGHTING MODES – In addition to steady and flashing modes in red, this waterproof bike light offers steady blue, flashing blue, and red-blue strobe modes, increasing visibility and attracting attention. USB RECHARGEABLE WITH DECENT BATTERY LIFE – 2 hours of charging provides 4 to 10 hours of runtime. For fast charging, connect to any USB power source such as a power bank, car charger, or AC adapter. Fully charge before first use. FITS EVERY BIKE – This rechargeable bike light installs quickly without tools and is compatible with all bicycle types, including road bikes, mountain bikes, and hybrid bikes. It can also be used as a helmet light, backpack light, or wheelchair light. Ensure the rubber band is stretched and secured properly to prevent detachment during use. Package includes: 1 x tail light, 2 x mounts, 1 x charging cable, and 1 x user manual