204151 Brand AROMA Model AM-706 Quantity 1 Piece(s) Color Black + White + Silver Material Plastic Compatible Models Guitar violin piano Application Fix the beat Other Feature Pure copper sway， high strength PPS plastic gear， high precision; wind-up deisign， no battery needed; Tempo range: 40bpm-208bpm; Beats: 0.2.3.4.6 Certification CE Packing List 1 x Mechanical metronome 1 x English instruction