Start Completely Dead Batteries: Equipped with 2000A peak power, the car battery jumper starter portable can instantly jump-start your 12V vehicles with dead batteries, compatible with up to 4.0L gas or 3.0L diesel engines. Featuring a FORCE START function, simply press the “BOOST” button to start completely dead or low-voltage car batteries 160 PSI Tire inflator Portable: With an upgraded 22000 RPM high-speed motor that delivers stronger airflow and faster tire inflation, it can inflate 235/45/R18 tire from 28 PSI to 35 PSI in just one minute.