Instapark 650 nm Red Laser Module Line 9 mm X 21 mm Optical Line Power : 2.0-3.2mW Operating Current : 20-40mA Operating Voltage : 3.0V(+/-0.25V) Wave Length at Peat Emission : 650nm(640-660nm) Operating temp. Range : 14-104F Storage Temp. Range -4-140F Expected Life: 5,000 hours Size (DxL ) : 9X21(mm) Fan angle : 110 degree Line width : 1.5-2mm @ 1m Line length : 1:3.0