4 in 1 Fiber Optic Power Multimeter The compact design and most powerful functions Builtin USB connector for rechargeable battery charger Simple 3 push-button operation Auto power off for energy saving. Function 1 Fiber Optical Power Meter Wide range of power measurement from 850nm to 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 and 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