Dimensions: 3.52 Inch Inch x 1.66 Inch Inch x 1.81 Inch Inch. (8) NiteLab UHE LEDs. Modes: Turbo (2000 lumens, 2h runtime); Higher (1300 lumens, 5h runtime); High (400 lumens, 14h runtime); Mid (100 lumens, 31h runtime); Aux White-Low (40 lumens, 40h runtime); Ultralow (8 lumens, 82h runtime); Aux Red-High (15 lumens, 37h runtime); Low (5 lumens, 66h runtime). 222m beam distance. Matrix-Design 8-Core UHE optics. Near-Center of gravity bracket. Skin-friendly, widened headband. Dual button interface. Lockout mode. Comes with storage case. Water resistant. Impact resistant. SOS strobe. Requires (1) 18650 battery (included). Boxed with hanging tab.