Eiechip Led Digital Voltmeter Ammeter Mini Dc Digital Multimeter 100v 10a

About The Item: Characteristic1 Display Voltage And Current Simultaneously In Different Colors, Red For Voltage, Blue For Current (the Current Is Measured In The Negative Rail). 2 Require External Power Supply; With Reversed Connection Protection. 3 Ground Wire Of Testing End And Power Supply Terminal Is The Same Wire; Quick Refresh Of About 500 Ms/time. 4 With Built-in Shunt, Has Voltage And Current Calibration Potentiometers. With Mini Sized48 X 29 X 21 Mm, Wide Measuring Range(dc 0-100v; 0-1.