It features multiple functionality which includes a high, low and strobe mode. It also offers a zoom in and out function. It is built for rugged use and environments such as hitting, dropping, and tossing around. Aluminum is used for the entire external casing and the grip area features a rubber ring that prevents rolling and absorbs shock from impact. Black powder coating is applied to have a semi-flat sheen finish for durability. Shine the flashlight for hundreds of meters away, or use it to impair the sight of a suspected assailant. Utilizing two separate sources for power, this is one of the most versatile high output LED flashlights available.  It comes with an environment friendly UltraFire rechargeable Li-Ion battery, capable of 3800mAh @3.7 volts. Alternatively, you can load 3 AAA batteries into the power magazine for universal power. The UltraFire battery recharges with a portable battery charger that plugs right into a standard 120 volt wall outlet. Overall Length: 5.25 inch Aluminum Alloy Housing Portable & Compact Design Power: UltraFire 1X 18650-3.7V Li-ion rechargeable battery (included) Light: LUXEON 3W Super Bright LED Modes: High, Low, Strobe Features: Shock-Proof & Weatherproof, Adjustable Zoom Color: Black Includes: 120v Wall Charger, Securing Wrist Band