ROHO Smart Check Mid Profile Single Compartment Cushion (Smart Check Device Included)

A little difficult to get the correct pressure with the Smart Check. Also very difficult to turn the inflation valve open and close.

We have had a difficult time getting the optimum inflation, but we are now closer to what it should be for the best comfort.

The smart check works well for me. After I set it up I hand checked it and the smart check is right on the money as far as submersion.