The "+E-Tube port" variant is intended for e-bikes without a free E-Tube port - usually e-bikes with one of these components:   motor E5000   Satellite System ON/OFF Switch   Di2 (electronic gear shifting system)PROPERTIES:Compatible with: SpeedBox ConnectActivation/deactivation: SpeedBox Connect/ LIGHTMaximum speed: unlimitedDisplay shows:   real values up to 23 km/ h   then the actual values are only displayed in the SpeedBox ConnectCompatible with motors:E8000E7000E6100E5000We do not recommend updating the software of the e-bikeKey featuresSpeedBox 1.2 B.Tuning with integrated Bluetooth is a completely redesigned tuning chip for e-bikes with Shimano E8000, E7000, E6100, and E5000 motors — with a new design, brand-new hardware, and firmware. It removes the 25 km/h speed limit and, thanks to the SpeedBox Connect app, offers a unique connection between the e-bike and a smartphone.Tuning controlTechnical specificationsMaximum speedUnlimitedDisplay showsReal-time values up to 23 km/h, then real-time values only in the SpeedBox Connect appCustom speed limitAdjustable in the app2 ways to activate / deactivateVia the SpeedBox Connect app / the LIGHT buttonBluetoothYesUpdatesYesMinimum mileage before installation10 km (new bike)Switching from the 25 km/h limit to unlimited mode and backSpeedBox ConnectConnects the e-bike to a mobile phone via BluetoothEasy installationThanks to clear instructions including a video, anyone can handle the installation