650nm laser module-red cross line laser-3mW (H-C9*23-650-5-C-P-O)
small exterior,only 9*23mm;
steady power (high quality laser diode with good APC),won't change with power supply(DC3-5V);
well consistency,less than 0.3mW;
long life:more than 5000H.
continuous work and so on.
can work within 1Meter. - Update: 2009-12-18