Versatile 4 in 1 Functionality: The MT-7615/7616 4 In 1 Fiber Optical Power Multimeter combines an Optical Power Meter, Visual Fault Locator (VFL), LAN Cable Tester, and Flashlight into one compact device. Accurate Optical Power Measurement: This Optical Power Meter supports measurements across 10 wavelengths including 850, 980, 1270, 1300, 1310, 1490, 1550, 1577, 1625, and 1650nm. It provides results in various units such as dB, dBm, nW, mW, and µW. Efficient LAN Cable Testing: The built-in LAN Cable Tester features a pin-to-pin cable map indicator with a maximum measuring length of 600m. Visual Fault Locator for Quick Diagnostics: The VFL function simplifies the process of identifying breakpoints and bad connections in fiber optic cables. Convenient LED Flashlight Included: The integrated LED Flashlight provides essential illumination for working in dark or confined spaces.