Shimano SpeedBox Tuning Derestriction Kit 1.0 for E6000 Motor EMTB Chip Dongle 8594206940038 | eBay
Amazon.com: Customer reviews: SPEEDBOX for Shimano Steps E8000, E7000, E6100 & E5000 | Electric Bike Tuning Chip | Remove Speed Limit for Mid Drive eBike Motor