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:Activation/deactivation: by turning off/ on the lightsMaximum speed: unlimitedSpeed limiter: deactivatedDisplay shows: real values up to 23 km/hCompatible with motors:E8000E7000E6100E5000Not compatible with: SpeedBox ConnectFrom the ground up redesigned tuning chip for your e-bike with a Shimano motor – with a new design and completely new hardware and firmware.The tuning chip SpeedBox 1.2 enables you to suppress the speed limiter on your electric bike. When in use, the actual speed will appear on your display up to 23 km/h.If you want to see correct speed and all riding data during your ride, we recommend choosing SpeedBox 1.2 B.Tuning for Shimano - you can see the real values in our SpeedBox Connect – right on the display of your phone.Compared to previous versions, this new product also plugs into the engine's E-Tube port. It is therefore necessary that the e-bike motor in which you are going to install the new version of SpeedBox for Shimano has one free E-Tube port. In case you do not have a free E-Tube port in the motor, please select “+E-Tube Port” variant.E-bikes, which do not have a free E-Tube port, are usually those with a Di2 electronic gear shifting system, with a tube integrated Satellite System ON/OFF Switch (EW-SW100, EW-SW300), or all e-bikes with E5000 motor. How does SpeedBox 1.2 work?This tuning chip can also be easily controlled with a LIGHT button. If the lights are turned off, SpeedBox is activated. If you want to have the tuning always activated, regardless of the lights status, connect the fork terminal from SpeedBox to the screw terminal marked "-". If you do not have lights function activated on your e-bike, SpeedBox will be activated at all times.AssemblyWe use original connectors for the production of SpeedBox chips ensuring that the installation process is very simple and the chip is connected properly. We have also prepared detailed instructions and videos to make installation easy for you. Disassembly of the tuning chip is just as easy. If you have any troubles with installation or disassembly, do not hesitate to contact us.If you are planning to install SpeedBox on a brand-new bike, make sure you ride it for at least 10 km before the chip is activated.