... 100KHz(max 100KHz) Accuracy:0.01Hz. Digital 4/5/6 LED Frequency Meter (FA) Features:1, Input: various wave ... etc,please indicate when ordering.3, 4/5/6 digit display,with demical point switched automatically;Opical ... protocol,connectable with various equipment,computer or PLC directly.6, Width Power supply:regular: 80-265V AC/DC ... 086-13435730867(Peter Liao) Digital 4/5/6 LED Frequency Meter (FA)