CORDLESS & LIMITLESS: This portable tyre inflator ensures one-handed control with its lightweight 450 gram build and compact dimensions of 13 x 5 x 19.5cm. It's perfect for roadside tyre refills, maintenance, and camping -- without the hassle of tangled cords. 19MM UPGRADED CYLINDER FOR EFFICIENT INFLATION: Leveraging 10 years of Car Tyre Inflator R&D expertise, AstroAI optimises cylinder structure and materials. The compact body houses a 19mm large-diameter cylinder, enhancing inflation efficiency, heat dissipation, and service life. It inflates a 195/65 R15 car tyre from 30-36PSI in 1.5 min and a motorcycle tyre from 29-35PSI in 1 min, swiftly resolving low tyre pressure issues. HIGH-CAPACITY, VERSATILE INFLATION: With dual batteries and USB charging ports, the AstroAI C4 Cordless Tyre Inflator has the strength to inflate either 9 car tyres, 18 motorcycle tyres, 30 bike tyres, or 88 balls. Its 4-level battery display ensures reliable power for all your inflation needs. EASY PRESET & AUTO SHUTOFF: Use the "+" and "-" Buttons to set pressure (long press for rapid adjustment). The auto shutoff feature prevents over-inflation. Power-off memory retains settings for next use. The digital screen displays real-time pressure and switches between 4 units. DETAILED DESIGN, UPGRADED USE: The quick-connect air hose connects to car tyres quickly, with 4-layer material to prevent air leakage. The LED light works well and comes with 4 adapters for cars, motors, bikes and balls.