I had this green laser attached to my SCT as a pointer. Only used several times and about six months old. Excellent condition. Uses a lithium battery for longer life. Heavy duty shell for proper heat sinking. Has X-Y (elevation and windage) controls that are also capped for water proofing. SMA connector and cable with a momentary switch that you can change if you wish. E-mail me for power output. Newly sold for $800. Price $500 plus ship.