Wavelength (nm) 473±1 Output power (mW) 0.6~1 1~3 3~5 Transverse mode Near TEM00 Beam divergence, full angle (mrad) <1. 5 Beam diameter at the aperture (mm) ~1. 5 Switch Push button Surface color Blue Range in darkness (m) 1000~2000 Power Consumption DC 3V Power supply 1×CR2 3V lithium batteries Expected lifetime (hours) 5000 Warranty 6 months Remark PGL-III -473 portable laser (FDA approval) with key switch up to 50mW is available.