This BOSS DR-110 Dr. Rhythm Graphic Analog Drum Machine is a great addition to any musician's gear. With its advanced experience level, this digital drum machine is perfect for creating unique and intricate beats. The machine is battery-powered and comes with a variety of features, including a 8-inch diameter and a plastic material. The item depth is 3.5 inches and it weighs 2 pounds, making it easy to transport and store. The drum machine is made in Japan and includes one piece, with no additional pieces needed. It is perfect for electronic drums, drums, percussion, and musical instruments in general.