Moon crescent front lightthe moon crescent front light is small and compact featuring high power cob leds with a maximum of 50 lumens output and a usb rechargeable battery with low battery indicator features 10 chips high brightness white led rechargeable lithium polymer battery3 7v 300mah 6 modes standardhighover drive50 flashing 100 flashing strobe quick release rubber strap handle barseatpost mount fits 22 31 8mm low battery charging and fully charged indicator usb rechargeabl