Lezyne led femto usb drive rear bike lightif you regularly commute by bike through a busy town or city, visibility is vital and the led femto usb rechargeable is perfect for this purpose. Lezyne has given this model a 5 lumen output and it offers up to 15 hours of battery life. This highly visible and high value rear bike light has a durable co moulded case thats fully waterproof, it has 5 different modes and it mounts with a universal strap mount. Wide angle lens for extra visibilitythis safety enhancing rear unit also has a lens with wide angle optics, giving you 270 degree visibility to other road users. Simple to attach using the versatile mounting straps, this dependable back light ensures pedestrians and other traffic are will always see you. Features material co moulded construction maximum output 5 lumens light type led lens type wide angle optics attachment versatile mounting strap, suits all seatpost sizes rechargeable battery yes removeable battery no battery life up to 15 hours recharge time 2.5 hours charging micro usb charging cable included waterproof yes, ipx7 rating visibility 270deg weight 23g run times flash one 5 lumens 15 hours flash two 5 lumens 15 hours flash three 5 lumens 15 hours pulse 5 lumens 9 hours solid 5 lumens 4.30 hoursbuy lezyne lights from chain reaction cycles, the world's largest online bike store.