SMAKN LED Tester Voltmeter Ammeter Digital Amp Volt Ampere Panel Meter DC Current 300V/300A Red/Blue 2-color

Dual LED: Red voltage, Blue current, Display Voltage Current on one screen 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: DC 4.5-30V
Measure Voltage: DC 0-300V
voltage < 100V, resolution: 0.1V
voltage >= 100V, resolution: 1V
Measure Current: 0-300A forward current ( this ammeter need an extra 300A shunt for measuring current, please check the description picture for connection reference )
Current Resolution: 0.1A
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, please check the description picture.
Power supply (two line socket):
Red wire: Power Supply +;
Black wire: Power Supply -
the power supply voltage can not exceed 30V

Measure Port ( three line socket)
COM: Black wire, measure common ground
PW+: Red wire, 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
Package Include:
1x 2in1 Voltmeter/Ammeter ( This item do not include shunt )