Mini Pro series OTDR adopts 4.3-inch capacitive touch screen. It integrates 16 functions, such as auto OTDR, expert OTDR, event map, OPM, LS, VFL, RJ45 cable tracker, 10G OPM, Optical Loss Test, OUN State-testing OTDR has a maximum dynamic range of 28dB, 8G memory, and can store more than 200,000 curves; it is equipped with 4000mAh high-density polymer lithium battery, intelligent power saving management, measuring time of more than 8 hours, and supporting power supply and charging of the power bank. series are used to measure the length, loss, connection quality and other parameters of optical fiber. It is widely used in FTTX, secondary backbone network engineering construction, maintenance and emergency repair test, and production measurement of optical fiber and cable.