Best selling rechargable the new standard in urban bike lighting the usb rechargeable volt 150xc delivers a constant 100 lumen output to see by and flashes at an ultravisible 150 lumen when you really need to be noticedusb rechargeable front light with up to 150 lumen outputintegrated li ion batteryside visibilityusb rechargeflextight handlebar bracketmodes high low flashruntimes 100lm 2 hrs 30lm 6 hrs 150lm 30 hrsbattery auto savelow battery indicatorlight mode memoryweight 42g