This Olight S1 Mini Baton HCRI is a super small personal LED flashlight with a built-in Micro-USA charge port and utilizes a single RCR123 Rechargeable battery (included). Flashlight body is finely braided knurled aluminum for a comfortable yet solid grip and feel. Magnetic tail cap. --Brightness Outputs: -Mode 1 450 to 250 Lumens - 1 to 55 Minutes -Mode 2 250 Lumens - 1 Hours -Mode 3 50 Lumens - 6 Hours -Mode 4 12 Lumens - 30 Hours -Mode 5 0.5 Lumens - 15 Days --Dimensions: -Length - 2.13" (54.00 mm) -Head Diameter - 0.83" (21.00 mm) -Body Diameter - 0.83" (21.00 mm) -Weight: 1.52 oz. (43 g) PRC