Features: Easy to install. Multiple colors for you to choose. Heat and cold resistant, high accuracy. Self setting low voltage, low voltage automatic alarm. Waterproof, high performance design and Fashion appearance. Specifications: Material: ABS Size: Approx. 5.3x4cm/2.09x1.57in Cable Length: Approx. 49cm/19.29in Input: 9-24V Wiring Method: Black line connect for negative Red line connect for positive Color: White/Red/Blue/Green/Purple/Orange Note: 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: 1 Set Digital Voltmeter