This series of meters adopts imported single-chip microcomputer programming, with quick response to test parameters, high precision and strong anti-interference. With upper and lower limit alarm function, optional 4-20mA auxiliary output, switching power supply 90-250VAC, display range 0-9999, with peak query and display hold functions. Please confirm with the customer service before ordering the instrument range, measuring current or voltage, AC or DC, whether with alarm or other special requirements, thank you for your cooperation!