Boss DB-30 Dr Beat Metronome 20 & 21 Inch China 657 A traditional medium size

657 A traditional medium size mouthpiece that includes a #3 standard rim and "c" backbore allows the player a full spectrium of sound

while neglecting the integrity of the mic preamp

2 footswitch jacks

the handlebars are different

* Transmit and receive module

Boss DB-30 Dr Beat Metronome 20 & 21 Inch China 657 A traditional medium sizeBoss DB 30 Dr Beat Metronome 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.