Optical Power Meter – 4-in-1 Fiber Optic Tool with VFL, RJ45 Tester & LED Light – Rechargeable Fiber Light Meter for 800–1700nm Signal Testing – Network Maintenance Device

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, 10km 650nm VFL, 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.

• 【4-in-1 Optical Fiber Tool for Field Technicians】- The Karvinger KPMOY9 combines four essential functions in one device: an optical power meter, a 650nm Visual Fault Locator (VFL), an RJ45 cable tester, and a built-in LED inspection light. Designed for fiber optic installers, technicians, and network engineers, it provides a compact, rugged, and portable solution for professional use in the field or on-site testing.
• 【High-Precision Optical Power Measurement】- Measure absolute and relative optical power across a wide wavelength range of 800–1700 nm using a sensitive InGaAs detector. Displays results in dBm and mW or nW, with 0.01 dB resolution. Easily switch between units and use the REF function to set a 0 dB reference. Ideal for accurate testing of fiber signal strength in live fiber optic installations or maintenance operations.
• 【RJ45 Cable Testing for Network Diagnosis】- The integrated RJ45 tester allows you to verify Ethernet cable continuity and wiring directly from the device without additional tools. Detect miswiring or open pairs in network cables quickly and efficiently. A must-have feature for field engineers performing hybrid fiber and copper network maintenance or testing LAN and telecom infrastructure.
• 【VFL + LED Work Light Built-In】- Easily detect fiber breaks, sharp bends, and continuity issues with the integrated 10km 650nm VFL in continuous or flashing mode. The powerful built-in LED light assists technicians in low-light environments, cabinets, or underground installations. A perfect companion for precise fiber inspection and troubleshooting even in challenging working conditions.
• 【Rechargeable Battery + Auto Shutdown Feature】- Powered by a rechargeable lithium battery with up to 20 hours of runtime and USB charging support. The smart 10-minute auto shutdown saves energy during idle periods. Compatible with SC, FC, and ST connectors, and built to withstand demanding conditions. The KPMOY9 is an all-in-one fiber optic and cable test tool engineered for performance and portability.
• 【Buy Risk-Free】- We have made customer satisfaction our number 1 priority. Because of this, the Karvinger OPM is guaranteed for 1 year from the date of purchase. The article does not suit you? Return it to us within 30 days and receive a refund. If you encounter a problem or have a question, our 100% English customer service responds 7 days a week.