* 3 50,000h lifespan Cree MC-E M LED * Max 2300 luminous flux output cool white 6800k color temperature * Max 50h runtime [FONT=宋](Tested by 6 x 18700 2400mAh[FONT=宋])[/FONT][/FONT] * 6~12V working voltage * Powered by 2*32650, 6*17670 / 18650 / 18700, 12*CR123A(3.0V), 4*17670 / 18650 / 18700 or 8*CR123A for emergency substitution power. * Head magnetic ring switch, preset 3 modes except O: * O— Off / H—Hi