Dimensions: 2.36 x 1.81 x 0.67. Water resistant. Impact resistant. COB dimmable flood beam LED. Modes: High (170 lumens, 2h runtime); Low (20 lumens, 11h runtime); Red light (5 lumens, 18h runtime); Red light strobe. USB rechargeable. Comes with bike mount, multi purpose clip, tactical kit, and nylon head strap. USB charging cord. Requires (1) Lithium battery (included). Hang packaged.