Dimensions: 3.13" x 2.25" x 1.38". Water resistant. Impact resistant. Rechargeable. Modes: Boost/All-On (400 lumens, 4h runtime); Spotlight (200 lumens, 12h runtime); Floodlight (100 lumens, 22h runtime). Adjustable woven fabric head strap with silicone grip. USB-C charging cable. Light can be removed from bracket for charging. Requires (1) Lithium battery (included). Clam packed.