These hilo pumps make it easy to pump large volume or high pressure by switching the mode on the base. You can pump your kiteboarding kite to 3psi quickly with large volume strokes then switch to high pressure to finish it to 8psi. Alternatively, you can start with high pressure on your inflatable SUP and get it up to 20psi. The mechanical advantage this pump provides you allows one handed pumping through out the process until the desired pressure is reached.
-Phil Midler
