Specifications: Brand:AUXITO Voltage:7.4 Volts Recommended Uses For Product:Tire Inflation Power Source:Battery Powered Noise Level:≤85 dB Features: *4+1 Modes The air compressor has four types of pressure units: PSI, KPA, BAR, and KG/CM ². There are four preset inflation modes: bicycle, motorcycle, car, and ball. The fifth custom mode can also set pressure values based on the inflation object to meet various inflation needs. It is an essential product for daily life and travel. *Persistent Power Tire Inflator .