This series of meters adopts imported single-chip microcomputer programming, with quick response to test parameters, high precision and strong anti-interference. Standard signal (0-10V, 4-20mA) input, with the standard signal output by the inverter, PLC and other upper equipment to measure and display the speed, line speed, frequency of the equipment, the conventional shipping power supply 220VAC, can be changed to DC24V power supply, display range 0-9999. Please confirm the input signal, display range, or other special requirements with the customer service before ordering. Thank you for your cooperation!