Features: High precision; Reverse connection for protection. 0.28inch digital LED display, convenient to read data. Power supply: for DC 3.50-30.0V, range: DC3.50-30.0V. Sealed plastic waterproof for shell with special design, durable and convenient. Suitable for Electromobile, Motorcycle, Car, etc. Specifications: Material: plastic Length: approx 4cm/1.6in Power supply: for DC 3.50-30.0V Measuring range: DC3.50-30.0V Display: 3 digits 0.28-inch Color: red/yellow/green/blue/white Note: Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Digital Voltmeter