Front 1 pc cree xm l2 u2 high brightness ledcnc aluminium heat sink light caplight sensitive auto onoffmode memory functionquick release rechargeable lithium ion battery 37v 1400 mah7 modes mode1 mode2 mode3 fl1 fl2 day flash double blast sosquick release universal bracket rb 25 fits all round bars and aero style barslow battery charging and fully charged indicatorautomatic fully charged cut off systemhigh precision optical lensside visibilitywater resistant ipx 4 rear