TMounts onto most Weaver / Picatinny / MIL-STD 1913/ Pistol accessory spec rails.Fits full size and compact framed pistols with 1.7-2.0 accessory rails.Fully adjustable for windage and elevation. Green Laser: 510nm, Max output less than 5mw, Class IIIa Laser.Button on each side of Laser Body allows the user to turn laser On/Off. Holding the button down while the laser is On, turns the Strobe feature On/Off.The laser features our Patented KEYMOD(TM) undermount for future KEYMOD(TM) accessories that can attach to the underside of the laser.US. PAT. 9,506,721US. PAT. D737399International orders will not include batteries.WEIGHT2.8ozLENGTH2inWIDTH1.1inDEPTH1.1inBATTERY INCLUDED2 CR1/3NCOLORBLACKMATERIALALUMINUM etail