Fabulous bit of kit to unlock the throttle in EU/UK.
It is very important to note your bike serial number, motor serial number and if possible take a photo of the (undone) plug that goes to the motor, showing the end with the coloured ring. I would also suggest you send the model number of the lcd screen too.
There are currently 2 or 3 versions of the USA controllers and while they will all work in a limited fashion, you need the correct one for your individual bike to make everything work...if in doubt, email customer support prior to ordering.