... Specifications Wavelength range (nm)800~1700Detector typeInGaAsStandard wavelength(nm)850, 1300, 1310, 1490, 1550, 1625Power testing range (dBm)-50~+ ... 60Weight (g)210 Dimension (mm)160×76×28Battery2 pcs AA batteries Battery working duration(h)No less than 75 (according ... ST800-A -50~+26FC2 pcs AA batteries 850, 1300, 1310, 1490, 1550, 1625ST800-B-70~+10FC2 pcs AA batteries 850, 1300, 1310, 1490, 1550, ...