The TOMSLINE AT-07 Tuner Pedal is a digital harmonizer octave multi pedal designed to fit acoustic electric guitars, bass guitars, and electric guitars. Made by Tomsline, this pedal allows guitarists to easily tune their instruments and create harmonic effects. With its Chinese origin and sleek design, the AT-07 Tuner Pedal is a versatile and reliable accessory for musicians looking to enhance their sound with precision tuning and multi-octave harmonies.