Description Green Laser Technology™ Dual Beam, 2 eye visible, green laser beams shoot in opposite directions. Includes adjustable spad hanging tabs. Operates from external 12V DC power. Solid Brass. Includes Alligator style battery clips and 5′ power cord. Dimensions 20 “L x 1” Dia. Images show GLX70012V-PV with the SE-20 Solar Tracking Installation System and with the AP353A Magnetic Dovetail Guide and Mounting Base Plate and the AP1000 Transit Adapter Plate w/ horizontal & vertical adjustment.