Shaped like the guitar pick, this is the eNote Digital Tuner from ELECA which helps you tune your musical instruments to the right notes. Just place it near your guitar and you will get green light for the correct note. However, you will still need to know what not corresponds to each string. This can also help you tune your bass, violin, banjos, dulcimers and other stringed instruments. You can get an eNote Digital Tuner for $25.

[via New Launches]