SPEEDBOX 3.0 for Bosch e-bike tuning - active performance CX - eBike speed chip | eBay
eBike Tuning SpeedBox 3.0 for Bosch Installation Instruction - YouTube
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