Feature:1. Dual Display: Display Voltage and current at the same time; Power supply: DC3.530V; Voltage test range: 0~300V; Current test range: 09.99A.2. Good Consistency: With exquisite SMT process, common ground design, the measurement end and the power supply end ground wire are connected (except for the isolation table).3. Calibration: Equipped with voltage calibration potentiometer, current calibration potentiometer, if there is an error, you can calibrate it yourself.4. High Performance: The voltmeter adopts decimal point automatic shift design, which has strong anti interference ability and fast display refresh speed.5. Practical in Use: Easy to connect, with a wide power supply range of DC3.530V (except for isolation meters), and has power supply with reverse polarity protection.Specification:Item Type: Volt Amp MeterMaterial: ABSParameter:Voltage Range: 300V Test range (v): 0.0-300V, resolution (v): 1V, impedance () >1MCurrent Range: 10A Test range (v): +/-0-9.99A, resolution (A): 0.01ADisplay Mode: 0.28in LED, bicolor (red and blue)Operating Current: <20mASupply Voltage: Non Isolated Meter: DC3. 5-30V (wide range) Note: The maximum power supply voltage of the non isolated meter should not exceed 30V, otherwise there is a risk of burning..Size: Approx. 48x29x21mm/1.9x1.1x0.8inMounting Hole: Approx. 45.5x26.5 mm/1.79x1.04inMeasurement Accuracy: 1% (2)Measurement Rate: 500mS/timeWorking Temperature: -10-+50CWorking Air Pressure: 80~106kPaWorking Humidity: 10-80% (non-condensing)Sun Exposure: Do not expose directly to the sunPackage List:1 xVolt Amp Meter