This 3000A jump pack is not only your regular car jump starter,it's also your all-weather companion, a helping hand when you need it most and a portable battery charger that can charge all your devices at once. It has three USB ports (5V 3A USB Type-C, USB 5V/9V/12V Quick charge, USB 5V/2. 1A) which can charge three devices at the same time. In addition, the 59.2Wh lithium polymer large-capacity battery can efficiently and lastingly power your equipment. With this GOOLOO auto pack, you don’t need to worry about outings without electricity. This GOOLOO jumper starter has built-in 10 kinds of general protections, The intelligent jump cable can read the vehicle's battery voltage for enhanced diagnostics of the battery condition and notify you the wrong operation by warning symbol and buzzing. it's also a great gift choice!