Features Size: 1 1/8 x 1 7/8 x 4 1/8". Includes a clear plastic cover that snaps on to the plastic model.. Fits comfortably in pocket or handbag. The winding key can be removed and placed into the face of the metronome for transportation. Range: 40 to 208 beats per minute, set by sliding the metal weight up and down the stem of the metronome. Winding the metronome fully will provide 25 to 40 minutes of sound depending on the tempo selected. 1 year manufactures warranty... Plus a 2nd year from us.. Color - Ruby - Red Made in Germany. Very accurate, yet one of the smallest key wound traditional mechanical metronomes available. To change the tempo of the metronome, simply slide the metronome weight up or down. Metronome markings are easily seen on the face of the metronome. The metronome wind up key can be removed from the side of the metronome and placed in the metronome for storage when the metronome cover is used. Instructions included. Tdm- Music (since 1981)