4-in-1 Multifunction: Optical Power Meter(OPM), Visual Fault Locator(VFL) , Network Cable tester and LED lighting function combined on 1 Unit.Test range: -70dBm~+6dBm, 5mw red light source.Optical Power Meter: Fiber cable tester to measure fiber loss, supports 7 wavelengths: 850nm/980nm/1300nm/1310nm/1490 nm, 1550nm/1625nm.Visual fault locator to locate fiber breakage or winding, with continuous and flashing working modes. Automatically runs all tests and checks for continuity, whether a lan cable is in good condition or broken circuit.Built-in 600mAh Li-ion Battery. USB Charge Port. LED flashlight for work in darkness. Easy-to-read LCD interface displays power loss data, wavelength, frequency, battery capacity and battery charge status.Colour:orange+blackMaterial:plastic Package Contents:1 x Optical Power Meter with Charging Cable Only the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.