The BOSS DR RHYTHM DR 55 is a digital drum machine compact unit featuring 6.35mm TRS/TS out and MIDI out ports. With a diameter of 3.5 inches, this programmable drum machine is perfect for creating rhythmic patterns for music and DJ performances. Made of plastic, this model from Boss is designed for drummers and music enthusiasts looking for a reliable and versatile drum machine. The included hi-hat pedal adds an extra element of realism to the machine's sound. POWER SUPPLIER NOT INCLUDED