PerformanceBikes will show you how to install a bicycle computer. Whether you have a simple computer or a more advanced computer you be able to see the basic instructions. Start by reading the instruction, install the handle bell mounts, install the wireless transmitter. You then install your spoke magnet, then calibrate your computer for your wheel size. Make sure you have read your own particular directions. If its not working, make sure you re-read your instruction, check your set up or check your batteries to make sure it has been installed correctly.