... ;Circuit function: low-voltage protection and high efficiency DC-DC, circuit will cut down power automatic when voltage of battery is low ... and not fades in color.5: Whole high definition toughened glass lens.6: High definition vacuum coating aluminum alloy reflect light cup ... , water project, forestry, outdoor, explore, trip and so on. Supply High Power Rechargeable Portable LED Flashlight 2000Lm 30W