500 lumens in boost' mode Adjustable brightness (High-350, Medium-150, Low-25 lumens) Bulb type: 1 x XP-G2 Cree White LED Light unit made from a hardwearing anodised aluminium USB Rechargeable Li-ion battery supplied Also supplied with Micro USB charging cable Single elasticated, adjustable camo head band Battery is positioned at rear in separate case (38mm x 102mm x 35mm), which also features single button operation red light Side operation button for front light Charging status indicator on rear: Red light indicates charging, green light indicates fully charged Weight including battery 190g Important Note: Re-charge battery every 3 months if not being used for a long time. The battery will only reach full performance after a few complete charging and discharging cycles.