2. Intelligent control circuits, five-speed memory dimming circuit. 
(1) Bright: current 3000mA, brightness 1600LM 
(2) Middle bright: current 1350mA, brightness 720LM
(3) low-bright: current 300mA, brightness 160LM 
(4) Strobe : current 1350mA, brightness 720LM 
(5) SOS: current 3000mA, brightness 1600LM
3 .Optical PMMA lens material.
4 .Shell aviation aluminum, CNC machining, anodizing surface treatment. 
5 .With two 18650 lithium battery with protected circut board, use time 1 hour. 
6. Specifications: 200mm (length) × 37mm (diameter).
7.Stretching the head part,the light beam will change from fouls to flood.
8.Go with the presented two type O sealing ring.