Features: 1 pc CREE XH-G high brightness LED AA alkaline battery 3 steady modes; 2 flashing modes Quick release handlebar mount (fits 22-31.8mm) High precision optical lens Side visibility Size (W x D x H): 26 x 26 x 88 mm Water resistant (IPX 4) Weight: 0.55kg / Packing & Package: 0.1kg Content: NOVA 80 AA alkaline battery RB-07 (Handlebar Bracket)