MT7615/7616 4 In 1 Fiber Optical Power Multimeter combines Optical Power Meter, Visual Fault Locator (VFL), LAN Cable Tester, and a Flashlight in a single compact device. Accurate optical power measurement across 10 wavelengths: 850, 980, 1270, 1300, 1310, 1490, 1550, 1577, 1625, and 1650 nm. Measurements supported in multiple units: dB, dBm, nW, mW, and uW. Efficient LAN cable testing: builtin LAN Cable Tester with a pintopin cable map indicator and a maximum measuring length of 600 m. Visual Fault Locator for quick diagnostics: helps identify breakpoints and bad connections in fiber optic cables. Integrated flashlight for working in lowlight environments. Practical and compact for field use and onsite maintenance, offering a single solution for optical power testing, fiber fault locating, LAN testing, and illumination. Use scenarios: Fiber network installation and maintenance (FTTH, data centers): verify link power budgets with the Optical Power Meter and quickly locate faults using the VFL. Fiber link troubleshooting in buildings or campuses: pinpoint breakpoints or degraded connections with the VFL while confirming performance across the listed wavelengths. LAN cabling verification and fault isolation: run pintopin tests up to 600 m to confirm cable integrity and identify miswires or open/short conditions. Product model and scope: MT7615/7616 4 In 1 Fiber Optical Power Multimeter, delivering four functions in one portable unit without omitting any of the listed capabilities.