... Counter,Digital Multimeter,DC Power,Audio Amplifier,5 in 1 universal systems TESTER1 Function Generator1.1 FeaturesWide frequency range,multi- ... in 8 ranges 2 Counter2.1 Features With CPU and IC-counter,intelligent,wide range,multifunction,highbright 8 digit LEDs ... 3%±5 words5. Audio Amplifier5.1 Features With AF power IC LM3886TF,has protection of overtemperature,overvoltage and short-circuit,input ...