TRIO is an easy to carry solution designed for musicians. With a barorecepter, a vibrator and a built-in bluetooth inside, Trio can work as a mute metronome and an automatic page-turner controlled by foot tapping, which can be connected to any smart phones or panel computers easily. With Trio, musicians can be more focused on the playing itself without having to tolerate the traditional noisy metromone or having to stop to turn the page, which is a great improvement for instrument playing and benefits both musician beginners and professionals.