The Korg Guitar and Bass Tuner is model GA-30.  It requires 2 AAA batteries which I inserted to take pictures.  THE BATTERIES WILL BE REMOVED AND WILL NOT BE SENT WITH THE TUNER.  The screen section in pictures one and two shows that this tuner switches from guitar to bass. Tuning.  There is also a sound button for hearing the pitch so you can tune by ear. There is an input jack to use for electric and bass guitars.  With a sleek silver design and made by the reputable brand Korg, this tuner is suitable for achieving accurate tuning for your guitar and bass.  This tuner is a high-quality accessory for any guitarist looking to ensure their instrument is always in tune.