The Snark SN-3 Guitar and Bass Metronome/ Tuner is automatic and chromatic and can tune electric and acoustic, and bass guitars. It has a full color display with a built in speaker. 

The electronic pitchpipe plays C C# D D# E F F# G G# A A# B and the pitch calibration 415-466Hz. The Snark SN-3 tunes using built-in mic or input jack and a tap tempo metronome. Tunes tighter so you sound better with dead-on accuracy.