Tuning de-restricting a Bosch Gen 4 eBike VOLspeed chip - YouTube
Tuningmodul E-Bike SPEEDBOX 2.0 B.TUNING Bluetooth für Display COBI/ …
SPEEDBOX 3.0 for Bosch / eBike Tuning, also for Bosch engines of the 4th Generation / Smart tuning chip of the 3rd Generation incl. 1 crank puller : Amazon.co.uk: Sports & Outdoors