Although not a chromatic tuner, this device saves a lot of time in tuning any guitar or bass. It has the option for drop tuning with up to 5 flats (if I remember correctly, not an option I use often), it only gets "confused" when more than one strings are played at a time. It does a real good job even in high noise environments, making it easy to tune even quiet acoustic guitars/basses without requiring an extra microphine. It will even tune electric guitars without a lead if there is little or no noise to interfere. As I said earlier, it's only downside is the limitation of not being a chromatic tuner. But i believe that for the size and weight it has, it's about as good as it gets!