I have an air compressor so I don't have and don't want to buy a foot or hand pump with a gauge. I've never found a pressure gauge that works with the balls needed to inflate it. I have one for splints but it doesn't work with a needle. This is a quick and easy way to check and fix the problem. All I have to do is inflate a little, put it in and press the release button to deflate some air. Works very well! Good quality product!