Blackburn: With 2 LEDs pumping out 65 lumens of power, 270 degrees of visibility and our unique BLITZ daytime running mode, the Dayblazer 65 is focused on visibility, so you can focus on your ride. Has your back, day or night: With 2 LEDs pumping out 65 lumens of power, 270 degrees of visibility and our unique BLITZ Daytime Running Mode the Dayblazer 65 is focused on safety, so you can focus on your ride. Also, because of the narrow profile of our unique mounting bracket, the Dayblazer 65 tail light can be mounted to just about anything you can think of from round or aero seat posts, to seat stays, to a rear rack, or your back pack. Recharge Type - Micro-USB rechargeable - Charges via any standard USB port (charging cable included) Brightness - Up to 65 lumens Battery Type - Lithium Polymer Recharge Time - 2-hour recharge Mounting Options - Versatile mounting system - Round seat posts, aero posts, seat stays or loops on bags/clothes (with the built-in wire clip) are all fair game for mounting the DAYBLAZER rear light thanks to its unique and reconfigurable bracket interface. No tools required Product Weight - 48 grams Run Time Solid mode: 1 hour at 50 lumens High Flash/Strobe mode: 3 hours at 65 lumens Low flash/Strobe mode: 6 hours at 35 lumens Water Resistance - IP-67 submersible - Ingress protection rating, or "IP Rating," is a techy way to describe the level of water- and dust-proofness of a product. This light meets the IP-67 Standard, which means it is totally protected against dust/grit and fully protected against the effects of immersion between 15cm and 1 meter for 30 minutes.