Breathing Training Device, Respiratory Muscle Training for Better Breathe, Guided Smart Breathing Exercise Assistant for Athletes and Sportspersons.

I purchased this as a tool to find out where my lung capacity has gotten to after a couple surgeries. Using this tool I have already in just over a month seen significant improvement. It is one tool you will ask yourself why you didn't think of it.

Good item but it stopped working after 5 days using((((( Quality is so low

I really wanted to like this, if it worked properly I'm sure I would. Feels nice to use, everything looks good, however it very rarely reads when I'm breathing out. Keeping because I can still use it for mindful breathing and as a way to help me quit smoking but for what it's actually supposed to do it's basically useless EDIT: turns out if you block the holes in the mouthpiece it will work every time...would have liked any sort of directions so I could have avoided this but hopefully this helps someone else. Good device but NEEDS INSTRUCTIONS

Some one else in my house loves it too. I had to buy. Second . It assists my meditational practices .

All the device does is measure your lung capacity. Doesnt actually train you or provide instructions. If all i wanted to do is exhale i wouldnt need a fancy device to do it.