Specifications:ABS flame retardant material has good electrical properties, high flame retardant and impact strength.Imported high integrated chip, higher precision, more stable.LED display screen, frosted mirror texture, color is consistent, more clear and more beautiful.High frequency low resistance capacitance, low consumption and strong endurance.Item Name: Digital VoltmeterMaterial: ABSMeasuring Range: 4.5V - 30VPower Supply Range: 4.5V - 30VMaximum Input: 30VPermissible Error: 0.5 PercentInput Impedance: More than 100KWorking Current: Red: Refresh Rate: About Once Every 300MDisplay Type: Three 0.56 inch Screen, LED Highlighter Digital TubeDisplay Color: RedWorking Temperature: -20 Degree Celsius - 65 Degree CelsiusFeatures: Mini, Portable, LED Display, Easy to UseLeadwire Length: 20cm/7.87" (Approx.)Boundary Dimension: Length: 48mm/1.89", Width: 29mm/1.14", Height: 22mm/0.87" (Approx.)Hole Size: Length: 46mm/1.81", Width: 27mm/1.06" (Approx.)Notes:Due to the light and screen setting difference, the items color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 x Digital Voltmeter