Optical Power Meter +26 to -50dBm W/ 20mW Visual Fault Locator Fiber Optic Cable Tester/FC Male-LC Female Adapter Measurement Range dBm: +26 to -50dBm Calibrated Wavelength(nm): 850, 980, 1300, 1310, 1490, 1550, 1625 Optical Connector: FC Adapter With FC Male-LC Female Adapter 20mW Visual Fault Locator Fiber Optic Cable Tester 18-20Km