The In-EarMetronome is a unique style of metronome that you use by wearing it directly in your ear. Since the speaker unit fits directly in your ear, it's useful not only for personal practice with any instrument, but also when you want to hear an accurate rhythm without being drowned out by the sounds of your surroundings, such as if you are practicing while surrounded by high-volume instruments. The tempo setting range is a generous 30--252 bpm, and a wide variety of beats and rhythms are provided. In spite of its ultra-small sized body, the In-EarMetronome provides approximately 200 hours of continuous operation using a coin-type lithium battery. The In-EarMetronome also includes a well-cushioned ear pad and a carrying case that neatly stores the In-EarMetronome.