Proskit MT-7602, 4 IN 1 FIBER OPTIC POWER MULTIMETER, Function 1 FIBER OPTICAL POWER METER Wide range of power measurement from 850nm to 1625nm Multiple mode:850nm/1300nm/ Single mode:1310nm/1490nm/1550nm/1625nm Power measurements in dBm,mW and uM Supports 2.5mm universal connectors (for ST/SC/FC) Function 2 VISUAL FAULT LOCATOR Easy to locate the breakpoint and bad connections in fiber optic cables Supports 2.5mm universal connectors (for ST/SC/FC) Both continuous and flashing modes available Function 3 CABLE TESTER Pin to pin cable map indicator (1~8 LEDs) Tests two types of connectors(RJ-11&RJ-45) The maximum length measurement: 600M Function 4 LED FLASHLIGHT Convenient for working in a dark environment Features 2 modes for long illumination and SOS signal