Features: Small size portable the magnitudes of voltage and current are displayed in the same screen simultaneously DC Voltmeter and ammeter for cars electromobiles and motorcycles Specifications: Supply voltage: 3.5 ~ 30V (wide range) Test voltage: 0 ~ 100V The minimum resolution below 10V: 0.01V The minimum resolution above 10V: 0.1V Display screen: 0.28 inch LED Operating current: DC 10A Measuring speed: 500mS / times Accuracy: 1%( 1 word) Minimum operating voltage: +3.5 V Maximum operating voltage: +30 V Operating Humidity:10~80% Operating tempratures: -10~+65 Operating pressure: 80 ~ 106kPa Avoid direct sunlight Net tweight:24 g Package weight:34 g Color of LED light: Red Package Content: 1 x Voltmeter Ammeter