A pedal tuner is a device used by musicians, particularly guitarists and bassists, to ensure their instruments are in tune. It is typically housed in a compact, durable pedal format, allowing it to be easily integrated into a musician's effects pedalboard. The tuner detects the pitch of the notes played and displays whether the instrument is in tune, sharp, or flat. Pedal tuners often feature a bright LED display for easy visibility on stage and can be powered by batteries or an external power supply. Many models also include additional features, such as a metronome or the ability to tune different instruments, making them versatile tools for musicians.