SerfasA(R) warrants to the original purchaser that the product is free of defects in material, construction, and/or workmanship for the lifetime of the product. Features: CPSC Passive Reflector Lens Up To 120 Hour LED Run Time Up To 1/2 Mile Visibility Optional Rack Mount Built-In Backpack Clip Uni-Taillight Mounting Bracket Included Specs: Modes: Steady / Flashing / Random & Rolling Weight: 112 Grams w/ Bracket Runtime: Steady 70 hrs / Flash 100 hrs / Random Rolling 120 hrs Battery: (2) AA