Features: 3 color for you to choose. Universal for car and motorcycles. High accuracy, reverse connection protect. Adopts international standard size, easy to install. LED voltmeter, you can see clearly in dark environment. Specifications: Material: Plastic Working Voltage: DC2.4-30V Mounting Holes: 23x14.5mm/0.91x0.57in Operating Temperature: -10 to 65 C Detection Voltage: DC2.4-30V Measurement Rate: 200mS Measurement Accuracy: 3 Maximum Operating Voltage: +30V Working Humidity: 10-80% (No Condensation) Working Pressure: 80-106kPa Size: Approx. 3.3x1.5x1cm/1.30x0.59x0.39in Color: Blue/Yellow/Green Note: The maximum test voltage shall not exceed 30V. Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Voltmeter