Features: - Emitter: CREE XPL HI LED Maximum 420 lumens output, power by 1x AA battery Maximum 800 lumens output, power by 1x 14500 battery - Driver: Most efficiency constant current circuit, maximum runtime up to 300 hours - Material: Aircraft-grad 7075 aluminum body - Surface treatment: Premium Type III hard-anodized anti-abrasive finish - Clip: Titanium coated stainless steel clip - Lens: Toughened ultra-clear glass lens with anti-reflective coating - With reversible & removable Stainless Steel Bezel - Forward Click Tail Switch - Dimensions: 105mm (length) x 35mm (Head diameter) - Weight: 75gram (without battery) - Brightness levels & Runtime: - Powered by 1x 2500mA AA NiMH battery - Working voltage: 0.8v-1.6v - Moonlight 0.5lm 300hrs - Low 5lm 13hrs - Middle 58lm 5.5hrs - High 220lm 1.5hrs - Turbo 420lm 1.3hrs Powered by 1x 3.7V 750mAh 14500 battery Working voltage: 2.7v - 4.2v Moonlight 7lm 90hrs, Low 45lm 12hrs, Middle 100lm 3.5hrs, High 270lm 1hrs, Turbo 800lm, 0.5hrs. Forward click tail switch, On/Off: Click for on and off, 5 output mode in total. Change modes: click within 0.64 seconds to change modes, the light will memory your last mode if the time get over 0.64 seconds between two clicks.