Cartridge laser collimator in stainless steel and brass, easy to use. Automatic ignition by closing the shutter, calibration distance from 25 meters to 500 meters. Power supply with three 393 type batteries supplied. Output power less than 1 mw, class 2 according to cei en 60825, free sale. It is important not to shoot with the laser inserted in the barrel. Gross weight: 45 grams.