Features: 1.Voltage Display: This meter has compact design and can display voltage and current at the same time and on the same screen. 2.Interference Resistant: Voltmeter adopts decimal point automatic shift design, strong anti interference ability and fast display refresh speed. 3.Performance: The measuring ground wire is connected to the power supply ground wire, giving you a convenient using experience. 4.High Efficiency: The supply voltage is DC 3.5?30V, power supply reversal will not burn, stable performance and high efficiency. 5.Features: Clear digital voltage display and excellent SMT technology, practical and reliable, exquisite workmanship. Specification: Item Type: Voltage Current Display Material: ABS Technical Parameters: Test Voltage Range: Range: 300V, test range (v) : 0-300V, resolution (v) : 1V, resistance () >2M Test Current Range: Range 50A, test range (A) : 0.0-50A, resolution (A) : 0.1A Product Size: Approx: 70x40x30mm/2.75x1.57x1.18in Installation Aperture: Approx: 68x38mm/2.67x1.49in Measurement Accuracy: 1% (1 bit) Measurement Rate: 500mS/ time Working Environment: Operating Temperature: -10-+65 Working Humidity: 10 - 80% (no condensation) Working Pressure: 80 -106kPa Operating Current: