Multiple Tuning Modes: chromatic, guitar, bass, vilion and ukulele C. Easy to Use: Large swivel LCD screen for ease of visibility when tuning. Rechargeable: Battery life time of 270 minutes, rechargeable by USB-C. Secure: Rubber covered clip for grips firmly and protects your instrumentfrom scratches. Convenience: Folding design for easy storage. Device Memory: Saves the mode that was previously used for next time you turn it on