Digital Voltmeter 0.28inch Two Wire DC 3.0-30V LED Display Voltage Meter Waterproof (Red) Features: 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: Plastic Weight: 10g/0.35oz Input voltage 3.0-30 (V) Measuring voltage: 3-30V Output voltage 3.5-30 (V) Low operating voltage: 3.5v High working voltage: 30V Operating current: less than 30mA Measurement rate: 200ms/ time Working temperature: - 10℃ ~ 65℃ Measurement accuracy: 3% Display: 0.28 inch LED digital tube Working humidity: 10-80% (no condensation) Working pressure: 80~106kPa Display color: Red, Yellow, Green, Blue (Optional) Package List: 1* LED Digital Voltmeter 1* Cable