16 mode driver circuit board for CREE / SSC LEDs - 17mm circuit board base diameter - Powered by 3 x 7135 IC's - 1000mA 3.7V output - 16-mode consolidated into 3 groups: Low (10%) - Mid (35%) - High (100%) - Strobe - SOS Low (10%) - Mid (35%) - High (100%) Low (10%) - Mid (35%) - High (100%) - Special Police Type Strobe - Slow Strobe (3Hz) - Super Slow Strobe (1Hz) - SOS - To switch mode stay in any mode for no more than 2 seconds then switch off. The next time the light is turned on it will enter the next mode. - To change mode group stay in the LOW mode for about 4 to 5 seconds wait for a quick flash response then switch off. The next time the light is turned on it will enter the next group of modes. If you do not turn off after the initial quick flash response the flashlight will quickly flash once more after 2 seconds meaning that mode group switch has been cancelled.