Link to InstalationInstalling these sensors can be difficult. They come will with 2 cable's and 2 magnets
Below is a photo of what you receive.
Depending on what brakes that you have some are an easy instalation and some are near on impossible to install.
To position the sensor we recommend that you use a cable tie and the double sided tape to hold it in position when testing.
Only then do we recommend using using epoxy.
Below is a post on electric bike forum which show different models