The Stinger DS LED HPL is designed for use by law enforcement so you can expect the durability and functionality demanded of such a position. This model comes with Streamlight's 'Duel Switch Technology' offering you not only the head switch found on most Stinger models but also a tactical tail switch operating independently, allowing you to alternate between On/Off, High, Medium, Low, and Strobe output modes. The C4 LED bulb produces up to 740 Lumens and 48,000 candle power with a 50,000 hour lifetime. The Stinger DS LED HPL 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 LED HPL comes with 120-Volt AC charger, a 12-Volt DC charger, two clip in charger stations, and works with existing Stinger chargers. The Stingler DS LED HPL lights up large, open spaces much better than the StingerXT or Stinger LED models - ideal for security, fire fighters, automotive work, outdoor activities, and much more. Between the unbreakable polycarbonate lens and machined aircraft aluminum casing, the Stinger's durability is next to none. If you're tired of constantly replacing batteries, 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.