The car digital voltmeter has easy to read and connect to your 12 volt system. Mainly used to monitor the storage-battery voltage and know the running status of the voltmeter and also can be applied to measuring the voltage of other products.   Features: Measures DC voltage precisely from 8V to 16.0V.  It can show real time voltage data for in-time adjusting the voltage.  Designed with 3-digit LED display to provide a clear reading.  It will display "LLL" when the voltage is lower than measuring range.  Display"HHH" when the voltage is higher than the measuring range.  Waterproof, dust-proof and shock-proof to ensure a long time and stable use.  Very convenient and easy to install and operate.  Widely used for cars, motorcycles, bikes, test equipment, voltage regulator and so on.   Specifications: LED display color: blue, red, white(optional);  Material: ABS;  Input voltage: 12V;  Voltage Rest Range: DC 8V~16V;  Display Type: 3 Digital LED Display;  Optional LED Light Color: Red, Blue, White;  Accuracy: ±0.2%;  Red Wire: power supply +;  Black Wire: power supply -;  Item weight: 26g / 0.92oz;  Package weight: 30g / 1.06oz;  Cable length: 95cm / 3.12ft;  Item size: 5.7 * 2.9 * 1.1cm / 2.24 * 1.14 * 0.43in;  Package size: 6 * 3 * 2cm / 2.36 * 1.18 * 0.79in;   Package List: 1 * LED Digital Voltmeter