1. There are strong filtering, shaping and amplifying circuits in it, which can adapt to the frequency measurement of complex waveforms.

2. Built-in automatic gain circuit can measure the frequency of signals with wide amplitude.

3. Excellent low-frequency testing ability, which can measure the lowest frequency of .1Hz.

4. by combining counting and width measurement, the accuracy of .5% can be obtained in the range of .1 Hz ~ 5 Hz.