It s portable reliable and fun to use -- the DB-30 helps musicians take their music to higher levels by offering a set of features that defies its diminutive size. Much more than just a simple timekeeper this pocket-sized metronome can lay down a variety of rhythm patterns and time feels to practice along with and it has a few timekeeping tricks up its sleeve as well. From the Manufacturer Its portable reliable and fun to use the DB-30 helps musicians take their music to higher levels by offering a set of features that defies its diminutive size. Much more than just a simple timekeeper this pocket-sized metronome can lay down a variety of rhythm patterns and time feels to practice along with and it has a few timekeeping tricks up its sleeve as well.