Three universal interfaces, support SC/FC/ST fiber optic interface, 7 test wavelengths, automatic detection and adjustment of frequency light attenuation, easy to use Low power consumption, USB fast charging, built-in lithium battery with large capacity, ultra-long standby, stylish and lightweight design, ABS material that ensures a better hand feel/easy carrying High resolution LCD screen, display linear optical performance and logarithmic performance, relative value measurement Pop up case, new design concept, simple and practical. Effectively protect the product structure for protection and operation