Tuner

A tuner is an electronic device used to tune a guitar. A guitar can get out of tune when not tuned often or if played heavily.

Typically, electric guitars will have to be tuned more often than acoustic guitars.

How it works
The tuner will pick up the noises around it. Reading the hertz, (Hz) or pitch, the tuner will display the note the guitarist is plucking and if the player needs to tune flat or sharp (Low or high) to get in tune.