Description: Quick and Accurate. No waiting for preheating, just plug and play. +/- 5%uncertainty, -70 to +3 dBm measurement, relative power calculation, calibration function. Durable. Sensitive chip and sturdy inner structure. Low battery consumption, 48 working hours for continuous operation.(3 x AA batteries not included) Clear Blue Screen. Detail means profession, a distinct result or information display ensures the satisfaction of user experience. 6 Wavelength and Light Source. 850/1300/1310/1490/1550/1625 nm+5KM red light locator+SC/FC/ST Adapter. Covering most needs of CATV CCTV Communication Engineering maintenance. Convenient Handy Size. 7.1x3.7x1.8 inches, Your trustful easy-carry fiber tester. Specification: Calibrated Wavelength (nm): 850nm,1300nm, 1310nm, 1490nm, 1550nm, 1625nm Measurement Range (dBm): -70 - +3 Resolution (dB): Linear 0.1% / Non-linear 0.01dBm Connector: SC, FC, Working Hours: >48 hours Package Includes: 1 Piece Optical Power Meter 1 Piece FC, SC Connector 1 Piece Bag 1 Piece Strap