The Karvinger KPMOY9 is a professional-grade 4-in-1 fiber optic tool built for installers, technicians, and network engineers. It combines an optical power meter, 10mW 650nm VFL red light source, RJ45 cable tester, and LED flashlight in a single compact device. Test optical power from –50 to +26 dBm across wavelengths from 800 to 1700 nm, with real-time display in dBm, mW, or relative dB. The KPMOY9 supports SC, FC, and ST connectors, and allows user calibration for accurate results in any environment. The integrated RJ45 tester checks Ethernet cable wiring instantly, while the VFL and LED light simplify fiber inspection. With USB charging, 20-hour battery life, and automatic shutdown, it's the perfect tool for field work and on-site diagnostics. Whether you're working on fiber optic installations, datacenters, or telecom systems, the KPMOY9 keeps your workflow efficient and reliable.