The awesome Boss TU-3 Pedal It has several functions chromatic Guitar and Bass mode. It has had support for 7 string guitars and 6 string basses. This tuner will last a lifetime of playing. Tough as nails stomp box can be gigged a lot and only show minor scratches. Boss compacts are belt to last.

The low profile and durable design of the TU10 eliminates the problem of weak tuner heads that can easily break off where it attaches to the clip. The battery life on this device is amazing. It has been known to last years on one battery. The battery it uses is Panasonic CR 2032 3V. It works great on seven string guitars. Standard Boss functionality with Accu-Pitch, flat tuning up to five semitones.