For those who gave up guitar because of finger pain, string buzzing, or the slow process of developing finger calluses, this chord training tool offers a practical alternative for learning and practicing chords. Key benefits 18button layout with more than 110 chords available, covering all basic chords in the keys of C, D, E, G, and A. Produces a clear and consistent tone that makes it easier to hear correct chord sounds compared with muted or unclean string rubbing. Designed to help you learn correct hand postures and build muscle memory, improving the speed and accuracy of chord changes. Simplifies practice for beginners and for players who need a pain way to rehearse chord progressions. Main functions and compatibility Chord selector with 18 buttons that access over 110 predefined chords. Includes all basic chords commonly used in the C, D, E, G, and A guitar keys, making it compatible with standard chord learning and song practice in those keys. Intended as a training and practice aid to support chord recognition, timing, and transition exercises. Performance notes Delivers clear tonal feedback for each chord, helping you identify correct voicings and ear training without relying on direct string plucking. Supports smoother chord transitions by allowing repeated, pain practice of hand shapes and finger movements. Practical use scenarios Home practice: Use for daily chord drills when direct string practice causes fingertip discomfort or fatigue. Lessons and classrooms: Use as a visual and audible teaching aid to demonstrate chord shapes and sound before transferring to the guitar. Songwriting and arrangement: Quickly audition chord progressions in C, D, E, G, and A keys while composing or arranging. This chord learning tool focuses on practical, repeatable practice to improve chord conversion efficiency and tonal recognition without requiring prolonged direct string playing.