Specifications Output volume: 35L/MIN Voltage: DC 12V-13.5V Max. Amperage: 15Amp Max.Pressure: 150 PSI Caution: Use with care. Do not exceed recommended pressure at any time of leave unattended while unit is running. Allow unit to cool after 15 minutes of continuous operation. When inflating balls, air mattresses and other soft inflatable material items, etc., avoid excessive pressure. (Note: Soft inflatable will not have existing pressure readings.) Warning: This is not a toy. Keep out of reach of children.