The Streamlight Stinger LED is designed for use by law enforcement so you can expect the durability and functionality demanded of such a position. The C4 LED bulb produces up to 350-Lumen, an incredible amount of light, with an unprecedented 50,000 hour lifespan, and multi-function On/Off button which switches between Low, Medium, High, and Strobe modes. The Stinger LED comes with a built in rechargeable nickel-cadmium battery lasting up to one hour of continuous use so you don't have to worry about keeping replacement batteries around, and can be recharged up to 1,000 times. The Stinger comes with 120-Volt AC charger, a 12-Vold DC charger, two charger holders, and fits existing Streamlight charger stations. The Stinger LED fulfils a broad range of lighting needs at an incredible value. Between the water resistant IPX-4 rating, an impact resistance of one meter, the polycarbonate lens, and casing made of 6000 series machined aircraft aluminum, the Stinger's durability is next to none. If you're tired of constantly replacing batteries/bulbs, need a light perfect for professional and domestic use, and you want your light to last you for years then don't settle for any other brand.