... stability, long life,low price DM650D5 red dot laser module Characteriscics:High-quality laser diode,optical glass lens, driver ... modules ,like as dot ,line /cross line laser module,DPSS laser,uniformline laser,single longitudinal mode green laserbeam ... *120mm,20*80mm,26*105mmcircuit:APCFocus: fixed / adjustablematerial of module housing : cooper / aluminumSpan of Life: 8000-10000hoursSpot diamension: ...