1: LED Chipset: Luminus SST-50; Color temperature: 6800K-8000K, life time: more than 50000-100000 hours. 2: Voltage: DC 5.5-12V, Max: 15V, double Li-battery protect; Current: LED whole course constant 5A, voltage step-down circuit input about 2-3Ah. Theoretical luminance: 1000-1200Lm for 1 hour; Dimming function: 100%-80%-50%-30%-10%-explode flash, total 6 grades; Circuit function: low-voltage protection and high efficiency DC-DC, circuit will cut down power automatic when voltage of battery is low enough in order to protect life time of battery. Use DC-DC step-down constant circuit and efficiency is more than 85%. 3: Extreme Range: 600M 4: Aerospace aluminum alloy and hard anodized body, made by exact CNC lathe, Military level hard anodic oxidation, wear-resisting and durable, radiance color and not fades in color. 5: Whole high definition toughened glass lens. 6: High definition vacuum coating aluminum alloy reflect light cup ( orange peel surface or glaze surface ). 7: IP level: IPX-8. 8: Battery: 2 x 18650 (2200mAh) Lithium Battery or 4 x CR123 Li-Battery. 9: Battery Charge: take out of battery and then charge. 10: Switch: click-type tailcap switch 11: Pro-environment silica gel deflating cap (Black or Green color). 12: Weight: 307.3g (exclude battery). 13: Widely usage: Police, traffic, fire-fight, water project, forestry, outdoor, explore, trip and so on. This model can headstand, also matches with fixture, and not become hot for long time running. Soft-press or power off 1-2 seconds for changing grade, not changing grade within 3 seconds power off. Please note that battery install in right direction. Also, use the same old and new level, the same specification, charge-discharge at the same time, not put it to no person¡¯s place for long time and avoid damage. Color box.