Kmise A6583 1 Piece Plastic Guitar Pit Channel Pipe Tuner 6 Tones for Acoustic Electric Guitar 6 Tone Standard Pitch Pipe Tuner for the ACOUSTIC, ELECTRIC or BASS GUITAR. Develops the ear more traditional tuners as you have to actually listen to what you are doing The hands-free pitch pipe allows you to play the reference note and still use your hands to make adjustments to your guitar