Streamlight Knucklehead with 120V AC /12V DC PiggyBack Charger - Black. Designed to put light where you need it, the Knucklehead is the most versatile light youll ever own. Engineered optics feature dual parabolic reflectors within a larger textured reflector optimizing light on target in conjunction with an overall smooth flood pattern. - Shockproof dual C4? premium LED technology delivers 200 lumens. - 4 modes: High 1150 candela peak beam intensity, 200 Lumens, 3.5 hour runtime. Low 350 candela peak beam intensity, 63 lumens, 16 hour runtime. Moonlight 20 day runtime. Flash 8 hour runtime. - Dual power source: accepts rechargeable NiCd battery pack or 4 "AA" alkaline batteries. - Rubber dome push-button actuator is easy to operate even when wearing heavy gloves. - Removable magnet with 135 lb pull strength features a replaceable rubber boot. - Optimized electronics provide regulated intensity. - High-impact, super-tough nylon polymer construction for exceptional durability. - 2 meter impact-resistance tested. - IPX4 rated for water-resistance. - Serialized for positive identification. - 9.2 in. (23.4 cm) NiCd 23.1 oz (655 grams) Alkaline 18.3 oz (519 grams).