... --100KHz(max 100KHz) Accuracy:0.01Hz. Digital 4/5/6 LED Frequency Meter (FA) Features:1, Input: various wave form pulse signal ... ,etc),contact switch,encoder,etc,used to measure power frequency(AC 0-- 600V),range:0.01Hz--100KHz(max 100KHz),accuracy:0 ... PLC directly.6, Width Power supply:regular: 80-265V AC/DC, others: 12--30V AC/DC indicate when ordering.7, Dimemsions: FA4: 48*48 ...