Safety you’ll never notice, but those around you will Key Features: Ultra bright strip COB LED technology – maximum 50 Lumen output, USB Li-Polymer rechargeable battery, Supersonically welded for weather resistance, Versatile rubber band mounting system (12-32mm) for seatposts and seatstays, Kinetic mode, Battery indicator, Battery Auto Save, converts to flashing mode so you’re never left in the dark, Recharge time: 2 hrs,. Mode: Output, Runtime (when not using Kinetic mode) Constant: 10Lm, 5 hrs,Rapid: 15Lm, 16 hrs,Flashing: 15Lm, 30 hrs.