1,high power led headlight 2,this headlight usd dry battery 3,full power can even last use 8-15 hours 4,3+7leds SY-551This headlamp adopt special focus reflecting cap , the light can reach as far as 150meters .It composes of 3XAA batterys ,the service life time of this LED light bulb is 100000 hours WARNING: if long time no use ,please take out the batteries.