The tk32 is a 900-lumen beast with integrated red, green, and blue LEDS. Amazing. thanks to the enlarged reflector and Cree xm-l2 u2 led, the tk32 flashlight transforms one 18650 battery into a 400-meter extended reach beam. The dual tail switch system is all you need to control this multi-color hunting flashlight. Perfect light for hunting, tracking, and other low-light applications. utilizes Cree xm-l2 (u2) led with a lifespan of 50,000 hours integrated red, green and blue LEDs with 100mw output uses one 18650 rechargeable li-ion battery or two cr123abatteries 159 mm (length) x25.4 Mm(Body diameter) x52mm(head diameter) 180-gram weight (excluding batteries) digitally regulated output - maintains constant brightness low-voltage warning function to remind users of low power reverse polarity protection to protect from improper battery installation anti-roll, slip-resistant body design dual tail switch for momentary-on and output selection made of durable aircraft-grade aluminum premium type iii hard-anodized anti-abrasive finish toughened ultra-clear glass lens with anti-reflective coating.