With the inflatable valve adapter you can connect any electric pump, foot pump or standard compressor to the Schrader valve, the standard valve for car and bicycle tires. It works on most inflatable boards. It is also suitable for boats and kayaks that also use the Roberts valve to inflate. Use your compressor or tire pump to easily reach 20 psi. Be careful not to inflate your board or boat too much and check the pressure of the board regularly. This is an adapter only. The inflation speed of your board depends on the pump used. Since the inflation of the compressors takes time, it is recommended to inflate the board with the manual pump until it is difficult to inflate, then use the adapter to inflate the pressure. Remove your SUP valve cap and ensure the inflation valve is sealed by turning the center pin to the out/closed position. Insert the valve adapter into the SUP valve the same way you used the pump hose nozzle. Connect any standard Schrader pump to the valve adapter to inflate your board. Monitor board pressure often during inflation