*Can work with different qty. Of LED (4, 16 & 28 LED), 35 hours with 4 LED working, 8.5 hours with 16 LED, and 5.5 hours with 28 LED *The telescopic shank & rotatable head allow for the adjustment of different lighting heights and directions *The internal circuit ensures the maximum battery life and protection from over-charging *Standard AA batteries can also be used in the lamp *The lamp can be charged in automobiles with a 10V adapter *Uses 28 LED with 100, 000 hours life time *Energy saving & environmentally friendly *Uses 4- AA (NI-MH) re-chargeable batteries, ideal for indoors & out door.