... model II, III and other instruments in field calibration.• 200mV, 2V, 20V, 200V and 700VDC voltage signal measuring scale.• 2mA, 20mA and 200mA DC current ... .• 200Ω, 2kΩ, 20kΩ, 200kΩ, 2MΩ and 20MΩ resistance measuring scale.• Diode voltage drop measuring and line break-and-make testing.• Frequency measuring function •Backlight used to reading ...