Specifications:Display Mode: 3 DigitsRange: DC 0-30VFeed input range: DC 4.5-30VPrecision: 1%Operating Current: less than 20mADisplay Color: Red/Blue/GreenStorage temperature: + -10°C-65°CSize: Approx. 46x29x22mm/1.81x1.14x0.87"The black wire connects the common negative, the red wire connects the positive power, the white wire connects the positive input of the detentionQuantity: 1 PcNote:Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bidDue to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!No Retail PackagePackage Includes:1 x Mini Car Voltmeter