Tail light featuring 2 day modes and 3 night modes and run times up to 100 hours 2 Day Modes (runtime): Solid - 60 lumens (6 hours), Pulse - 100 lumens (20 hours) 3 Night Modes (runtime): Solid - 20 lumens (20 hours), Flash - 20 lumens (100 hours), Pulse - 20 lumens (30 hours) USB rechargeable li-polymer battery Weatherproof exterior for all season riding Includes brackets for seatpost and seatstay mounting Mounts vertically or horizontally Includes Micro USB recharging cord Black 5 Rear Silicone Strap USB 100UPC/EAN/GTIN: 812938014451