... Calibrated Wave length 850,980,1300,1310,1490,1550 Optical CATV Network Fiber Checker handheld optical power meterSWJW3208A handheld optical ... functionPower measurements in dBm or mw and insertion loss in dB Low battery consumption, more than 240 hours continual operation ... 5%Calibrated Wavelength(nm) 850,980,1300,1310,1490,1550Resolution(dB) 0.01Optical Connector FC(interchangeable SC ST) as well ...