12 Volts | Maximum PSI: 2.5 Powerful pump for towable tubes. A pressure release valve is included to limit pressure to 1.4 psi. Uses alligator clips to attach to any car or boat battery Includes: (5) Universal valve fittings fit all popular valves, carry handle, 21″ reinforced hose, alligator clips connected to a 10 ft. power cord. Air flow: Inflates/deflates. Amps/watts: 2.8 amps/340 watts.