Features Robust and durable in use - High quality three-conductor voltmeter with 4-30V DC, practical and durable. Waterproof shell - Sealed waterproof plastic shell with foldable design, durable and practical. Good working performance - The voltmeter maintains high precision and reverse polarity protection. Clear LED display - 0.36 inch digital LED display, convenient for reading data. Auto Decimal Point - Move the decimal point automatically. Specification: Material: plastic. Weight: 13g/0.5oz Operating voltage: 4-30 V. Test voltage: 0-100V. Operating current: less than 20 mA. Mounting connection: 23 x 14.5 mm. Measuring rate: 200ms/time Working temperature: -10 ℃ ~ 65 ℃. Measuring accuracy: 3%. Working humidity: 10-80% (no condensation) Working pressure: 80~106 kPa. Display colour: red, yellow, green, blue (optional). Package list: 1 x LED digital voltmeter. 1 x cable. Package List