Car battery voltage display
Function 1: car battery voltage monitoring,for 12V cars, SUV, 24V trucks, buses.
Function 2: USB charger, for the charger of 0-2.1A cell phones,
digital cameras, tablet pc and etc.
With high brightness of LED there is no difficulty in seeing the display
Powered by car cigarette lighter charger (DC 12~24 V)
Installation: insert the jack of the product into a cigar socket