... Size:158*13(Dia)mm Batteries:2pcs AAA Material:Brass 1-200mW High Power Green Laser PointerOutput power:5mw,10mw,20mw ... . Project screens, video monitors and inspection,5. Presentations, museum and tour guides. Output power:5mw,10mw,20mw,30mw,50mw,100mw,200mw ...