... Koto (WST520B) in a convenient palm-size unit. Protable Tuner Set for Guzheng Chinese Zither Koto (WST520B)Cherub WMT-555B 3 ... : 2centTuning item: D, G, C, F , B, AA4: 435-445HzTempo: 30~230bmpBeat: -/4(0), 1/4 ,2/4, 3/4, 4 ... Koto1 x Earphone1 x Data cable2 x Battery Protable Tuner Set for Guzheng Chinese Zither Koto (WST520B)