SpeedBox 3.0 B.Tuning Derestrict Kit for Bafang M300 M400 (3 pin connector)

Bafang Max Drive M300 (3pin connector). - Bafang Max Drive M400 (3pin connector). - Bafang Max Drive M420. - Bafang Max Drive M500. SpeedBox 3.0 B.Tuning enables to select speed limit of your own choice.

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