maximum range: 200-500mBrightness: 260 lumensBulb: CREE XPE / 3 mode (High-Low-Strobe)Material: aluminium alloyBattery requirement: a 18650 lithium battery Lamp life: 100，000 hours Stalls: 3-speed zoom (high light， low light， strobe) Lighting time: high light about 2 hours， low light and strobe 8 hours or more Note: Strobe cause instant blindness 45 seconds