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

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

Great product, light and easy to use

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

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.

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.