... Range:0.01Hz--100KHz(max 100KHz) Accuracy:0.01Hz. Digital 4/5/6 LED Frequency Meter (FA) Features:1, Input: various wave ... width,duty cycle,etc,please indicate when ordering.3, 4/5/6 digit display,with demical point switched automatically;Opical isolation for input ... and output,high anti-interference.4, Output:up to 3 ...