A.±0.3v B.±0.5v C.±0.6v D.±0.8v
A.8V~12V B.8V~14V C.10V~12V D.10V~14V
A.2Km/h~20Km/h B.2Km/h~30Km/h C.3Km/h~25Km/h D.3Km/h~30Km/h