Tuning Chip E-Bike SPEEDBOX 1.2 B.TUNING compatible with SPEEDBOX App for display: Shimano steps Assembly: invisible at the drive motor displayed: Actual values up to 23 km/h, then in app activation: light-button
Shimano E8000 Speed Unlock with Eplus Flash (ENG) - YouTube
MZ Tuning ST - E-Bike Speed Unlock Sensor from MzLab on Tindie