Features High-quality three-wire 4-30V DC voltmeter, practical and durable. Automatically move the decimal point. Sealed plastic waterproof case, foldable design, durable and convenient. 0.36-inch digital LED display, easy to read data. High precision and reverse protection. Features: -High-quality three-wire 4-30V DC voltmeter, practical and durable. -Automatically move the decimal point. -Sealed plastic waterproof case, foldable design, durable and convenient. - 0.36-inch digital LED display, easy to read data. -High precision and reverse protection. Specification: Material: Plastic Weight: 13g/0.5oz Operating voltage: 4-30V Test voltage: 0-100V Operating current: less than 20mA Mounting port: 23x14.5mm Measurement rate: 200ms/ time Working temperature: - 10 ℃ ~ 65 ℃ Measurement accuracy: 3% 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 Package List