1) the lamp uses environmentally friendly AA nickel metal hydride rechargeable batteries, ideal for home use and outdoor activities 2) the lamp can work with different quantities of led for different lighting conditions (4, 16, 28 led) 3) when the batteries are fully charged, operating time with 4 led is 35 hours, 8.5 hours with 16 led, and 5.5 hours with 28 led 4) the telescopic shank and rotatable head allow for the adjustment of different lighting heights and directions 5) the internal circuits ensure the maximum battery life and protection from over- charging 6) the strong aluminum structure keeps the lamp lightweight and durable 7) standard AA batteries can also be used in the lamp 8) the lamp can be charged in automobiles with a 12v adapter Show More