Tianya Mini Mechanical Metronome Black Color Metronome for Musicians Piano Guitar 100% New, great looks as the photo shown, spring driven traditional metronome. Dimensions: 1.2" x 2"x 4.3" / 30 * 50 * 110(mm); Material: Hard Plastic Outer With High Quality Metal Mechanism; Specifications: 40-208 Bpm, Tolerance: &lt;= 1%; [Package Included]: 1 x Mini Metronome; 1 x Paper Box; 1 x Paper Instructions;