As the prior post mentions, you need to charge the Kiox display by USB first. The Kiox display is magnetically attached, and will pull off unless the screw has been installed on the back to prevent this. So you don't have to leave on the bike to charge it. There is a usb port with a rubber plug that is a little hard to get out. It is a very strange "chicken & egg" situation. Once it is going, and you power on the bike, you won't have to do this again with normal usage.