Features and Benefits:Front: 75/150lm;Top: 100lm;4/2/2.5h operating time (step 1/2 top);3.7V 750mAh Li-on battery;150lm rechargeable LED pen light. The two new pen lights are small and sturdy designedfor professional users. With its compact and durabledeisgn, the pen lights are ultra-light weight and featureanti-corrosion.