Features:High quality two-wire 3.0-30V DC voltmeter, practical and durable.Sealed plastic waterproof shell with folding design, durable and convenient.0.28inch digital LED display, convenient to read data.High precision, reverse protection.Move the decimal point automatically.Specification:Material: PlasticWeight: 10g/0.35ozInput voltage 3.0-30 (V)Measuring voltage: 3-30VOutput voltage 3.5-30 (V)Low operating voltage: 3.5vHigh working voltage: 30VOperating current: less than 30mAMeasurement rate: 200ms/ timeWorking temperature: - 10 ~ 65Measurement accuracy: 3%Display: 0.28 inch LED digital tubeWorking humidity: 10-80% (no condensation)Working pressure: 80~106kPaDisplay color: Red, Yellow, Green, Blue (Optional)Package List:1* LED Digital Voltmeter1* Cable