Save your energy for the water and pump up your board or wing with an electric pump. 12 volt connection with dual inflation/deflation modes. Inflates up to 22psi (16 psi with internal battery). Comes with a variety of fittings to inflate everything from SUPs, wings, kites, water toys, mattresses etc.  Digital display with PSI meter allows you to set it and forget it, with the pump disengaging when board or inflatable item reaches the selected PSI.