Description: Widely used in laboratory and music class for making standard time, also used in dark room and other field for timing. Beat frequency from 20, 40, 60, 80, 100, 120, 140, 160, 180, 200 beat/min (10 steps), and also could adjust the beat from 20 to 200 beat/min continuously. |
No.1, Bei Yi Xiang, Damucang Hutong, Xidan, Beijing P.R.C.100032
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Damucang Hutong, Xidan, Beijing P.R.C.100032