A sleek, compact, USB rechargeable Pen light allows you the flexibility of charging on-the-go using the included USB cord or optional match wall adaptor removable pocket clip push-button tail switch nylon holster durable, anodized machined aircraft aluminum construction rechargeable lithium-ion battery sliding metal sleeve protects USB port recharge by plugging into USB port or optional match wall adapter C4 LED produces 70 lumens, 630 candela, and runs 3.5 hours lithium-ion battery recharges in 2.5 hours and is rechargeable up to 30 times charge indicator: lights red when charging and lights green when fully charged fully regulated output for consistent Lumen performance over the battery life gasket-sealed glass lens IPX4 water-resistant 1 meter impact-resistance tested 6.15 inch and 1.9 oz. With battery features: - a sleek, compact, USB rechargeable Pen light - allows you the flexibility of charging on-the-go using the USB cord or the compact match wall adaptor - C4 LED (white): 70 lumens; 630 candela; runs 3.5 hours - fully regulated output for consistent Lumen performance over the battery life - lithium ion battery fully recharges in-product in 2.5 hours rechargeable up to 300 times - charge indication LED: LED red - charging; LED green -charged - rechargeable using Supplied USB cord or optional match wall adapter - machined aluminum alloy case.