The quickest 11.1V rechargeable battery air pump on the market. Inflating a medium-sized car’s 26.3″ tire (28-33 PSI) takes only 56 seconds. It inflates with a precision of ±1 PSI. It is the best choice for a tire inflator because it is both fast and accurate. Under normal outdoor temperatures, the X8 Apex can operate continuously for 40 minutes on a full charge. It can pump 16 tires constantly without pausing thanks to our ingenious proprietary cooling system. No need to wait for cooling. It has four preset inflation modes (bikes, motorcycles, vehicles, and balls) and three preset units (PSI, KPA, and BAR). With a single click, you can choose the appropriate inflation mode, and the philosophy is set-and-forget. When the X8 Apex reaches the predetermined pressure value, it will automatically stop, allowing you to relax without having to check it constantly.