Xtreme Bright X-96 USB Rechargeable LED Bike Taillight - 650mAh Battery (USB Cable Incl.), 4 Light Modes Xtreme Bright Rear Bike Light comes with a long-lasting 650 mAh power cell conveniently re-charged by ports on most computers (charging cord included) Taillight features 4 settings: high power/low power/strobe/SOS providing added safety & security in all conditions Compact - Easy to install with no tools required  Durable & flexible mounting bracket securely holds casing in place Detach from mounting bracket & use as a tactical or emergency flashlight when hiking, climbing, or camping High quality nightlight comes with our 100% Lifetime Guarantee with 'No Questions Asked'