Designed with short range power in mind, this laser uses 3 x 9mm 445nm arranged in a knife edge array. Diode collimation optics are AR coated glass aspheric, focus is adjustable via zoom type 4xintegral beam expander. Also features full time active cooling to help tame the 6+ amps of current which the diodes consume. As of Sept. 2013, the worlds most powerful handheld laser in a visible wavelength.