This is incredible! It shows a frequency value for your note, it can block out additional noise, and can tune within +/- .5 cents. This is one of th4e greatest gadgets on the planet. You can start with over overall pitch and work your way down to each tension rod and get the most accurate tune your drums have ever had. If you're not sure where to tune your drums, download the app and it will give you an amazing starting point, including artist presets. IT'S AMAZING!