... , driver circuit and housing High reliability, high stability, long life,low price DM650D5 red dot laser module Characteriscics:High-quality laser diode,optical glass ... : fixed / adjustablematerial of module housing : cooper / aluminumSpan of Life: 8000-10000hoursSpot diamension: 0.5mm (thinnest) Characteriscics:High-quality laser diode,optical glass lens ...