Product Review

Features:
Dual LED: Dual-color(red and blue) voltage and current, Display Voltage Current at same time
this panel meter is common ground design, it means that the ( measure ground wire) and (power supply ground) is common ground.
Power Supply DC 4.5-30V. With reverse polarity protection, but the max power supply can not exceed 30VDC.

Specific:
Power Supply (Measure Voltage): DC 4.5-30V
voltage < 10V, resolution: 0.01V
voltage > / = 10V, resolution: 0.1V
Measure Current: 0-10A forward current ( built-in shunt, can measurement directly )
Current Resolution: 0.01A
Operating Current: < 20mA
Display: 0.28 "LED Dual-color (red and blue)
Dimensions: 48 x 29 x 21 mm
Cutting Size: 45 x 26 mm
Measurement rate: ≥ 500mS / times
Accuracy: 1% (± 1 digit )
Operating Temperature: -10°c ~ +65°c
Operating Humidity: 10 ~ 80% (non-condensing)
Working pressure: 80 ~ 106kPa

Wire Connection:
COM: Black wire,Power Supply -, Measure Voltage -
PW+: Red wire, Power Supply +, Measure Voltage +
IN+, Yellow wire, Measure current input. if use the voltmeter function only, please connect the Yellow wire and black wire together to avoid the Interference

More detailed please check the description picture.

Package Include:
1x Ammeter/Voltmeter 2in1