COB LED White or Red Functions: Steady - Flash - Off. With Low Battery Indicator Luminance: 30Lm Waterproof: IPX4 Battery Size: 3.7v 300mAh Proprietary Lithium Brands : ETC Colour : Black Series : Mainline Size : 30 Lumens Bulb : COB LED Battery(s) Included Battery 3.7V 300mAh Fitment : Silicon Strap Output (Lumens) 30 Power Plug Type : USB Rechargeable Colour : Black