Auto overwrite cyclic storage The storage contents are the measured wavelength (nm), optical attenuation coefficient (dbm) and optical power (mw. uw. nw). The storage is cyclic, so new measurements overwrite the oldest data when capacity is reached. Universal interface and wide compatibility The interface uses a 2.5mm universal interface and is plug-and-play without adapters. It supports SC, FC, and ST three common optical fiber interfaces. LED auxiliary lighting The device includes an LED strong light flashlight function, convenient for construction work in low light environments. Dual power supply modes Using advanced power management technology, it can be powered by 3 dry batteries or lithium batteries. It can also use the USB interface to connect an external power supply for direct power supply. Typical use scenarios - Field installation and network testing: verify wavelength, attenuation, and optical power on installed fiber links and at connectors using SC/FC/ST interfaces. - Maintenance and fault finding: quickly assess power loss and attenuation in active links to locate faults or degraded connections. - Lab or on-site work in low light: perform measurements with the built-in LED lighting when ambient lighting is insufficient.