The Electro-Harmonix KEY9 Electric Piano Machine Digital Effects Pedal is a versatile accessory designed for electric guitars and bass guitars. As a digital effects pedal, it offers a wide range of tones and effects to enhance the sound of your instrument. The Electro-Harmonix brand is known for its high-quality and reliable gear, making this pedal a solid choice for musicians looking to add a digital twist to their playing style. The model KEY9 is specifically designed to provide a wide range of electric piano sounds and effects, allowing for endless creative possibilities on stage or in the studio.