Streamlight manufactures lights designed for professionals, when you truly rely on a light to get the job done, Streamlight is the brand for you. The Knucklehead is a rugged work light applicable for a variety of situations and work environments. The adjustable head rotates a full 360 degrees with another 210 degrees of articulation. The sturdy, 2.75 in thick base makes this work light stand strong on a variety of surfaces. Plus, the integrated hook and rare-earth magnet (located on the base, with incredible 135 lb pull strength) allow you to hang the Knucklehead upside down, from the ceiling, against a wall, or on other various objects to provide optimal visibility no matter what the job. Two C4 LEDs provide up to 200 lumens of light in a flood formation to give you a wide field of vision so you won't have to constantly readjust the Knucklehead's position while you work. Four different output modes are selectable from the sonic welded push button switch, High, Low, Moonlight, and Strobe. Use the moonlight mode when every moment of battery life counts, or strobe to bring attention to a work site. The Knucklehead is built to last and to withstand tough working conditions. The LED is protected by a virtually unbreakable polycarbonate lens, and the casing is made of super tough, but lightweight, high impact nylon, tested up to 2 meters of impact resistance. All openings on the Knucklehead are O-ring sealed providing an IPX4 water resistance rating. Furthermore, the Knucklehead has nearly non-existent operating costs thanks to the rechargeable Ni-Cd 4.8-Volt, 4 cell sub-C battery provides 3.5 hours of continuous runtime on High, or 16 hours on Low mode. This model comes with a 120-Volt AC charger, 12-Volt DC charger, and charger station. AA battery casing is also available so you can use disposable batteries in a pinch.