Features 【MULTI-PURPOSE】: A professionally manufactured digital voltmeter, which is very suitable for monitoring battery conditions, and can be used to measure the battery voltage of automobiles, battery cars, motorcycles, etc., and determine the remaining capacity of the battery. 【USE】: High-quality three-wire 4-30V DC voltmeter, different colors are easy to quickly distinguish the positive and negative poles, to ensure that the voltmeter is connected correctly, light and compact, and the digital voltmeter is easy to carry and store. 【SAFETY】: Sealed plastic waterproof casing, solid structure of DC voltmeter, protection of digital display meter, preventing damage, internal reverse connection protection function, stable measurement and safe operation. 【ACCURACY】: With a 0.36-inch digital LED display, built-in high-sensitivity chip, the digital voltmeter responds quickly, the test battery results are clear and accurate, and it is convenient to read data in the dark. 【FLEXIBLE】: The decimal point moves automatically, the detection voltage is within 10V, the decimal point displays the last two digits of the measured voltage, and the detection voltage is more than 10V, and the decimal point displays the last digit, and the measurement data is reliable. 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