Ultracompact with maximum user comfort, the FiberMASTER MM-OTDR enables quick verification, fault diagnosis, and certification of multimode fibers. The simplified configuration options enhance user convenience, reduce training time, and lower the risk of errors. The FiberMASTER MM-OTDR features a dynamic range of 29/30 dB for multimode fibers and small dead zones of 1 meter and 5 meters. With its clear Pass/Fail assessment, the integrated software simplifies the certification of fiber optic cables according to ISO, IEC, IEEE, and TIA specifications; additional parameters can be easily set. FiberMASTER automates the testing process and guides users step by step through the entire procedure. Effortless management of test data is facilitated by the reporting software CertSoft. The MM-OTDR is equipped with a multimode port (850/1300 nm), power meter, VFL red light source, a touchscreen for enhanced user comfort, a lithium-polymer battery for 10 hours of operation, a connection for fiber optic test microscopes, USB port, as well as a robust housing and protected connectors to prevent damage.