Features: 1.Dual Display: Display Voltage and current at the same time; Power supply: DC3.5?30V; Voltage test range: 0~300V; Current test range: 0?9.99A. 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 DC3.5?30V (except for isolation meters), and has power supply with reverse polarity protection. Specification: Item Type: Volt Amp Meter Material: ABS Parameter: Voltage Range: 300V Test range (v): 0.0-300V, resolution (v): 1V, impedance () >1M Current Range: 10A Test range (v): +/-0-9.99A, resolution (A): 0.01A Display Mode: 0.28in LED, bicolor (red and blue) Operating Current: