With the Korg GA-2 you can tune your electric or acoustic (bass) guitar. The guitar tuner is suitable for tuning electric guitars thanks to the 6.3 millimeter input. You do this by connecting your guitar to the design of the tuner via a 6.3 millimeter jack cable. You tune the guitar's keynote between 430 and 450 Hertz thanks to the calibration function. This makes it possible to tune your guitar to the base of 432 or 440 Hertz. The batteries last 200 hours. This means that the batteries last longer than those of comparable ones. Are you looking for a tuner for 7 string guitars? Then the GA-2 is something for you, because the copy also reflects the pitch of the seventh string.