1、The products are universal to 24V cars,with 5 protections built-in:Anti-backlash, anti short circuit, anti-reverse, anti-overcurrent, anti low-voltage; tends to high-end market;with red and white warning lights and power display screen; with battery master switch built-in,it only consumes 0.1%-0.2% power after 3 months no use. 2、Product aging for 5 times(once monolithic aging batteries, a good pair of batteries again after aging group, the group of batteries and batteries protection board consisting of a battery aging, battery pack and product protection plate aging time together, assembling good product aging time). 3、Accessories:car jump starter,12V Jump start clamps,DC Car charger,AC Adaptor, 8 in 1 Assorted laptop connectors,Universal DC cable,Manual ,warranty card,certificate.