To enjoy the indoor cycling wonderland of Zwift you need Bluetooth to connect either to your Apple tv, computer or other internet connection. If you have a trainer that you’ve equipped with an older Garmin bike computer, or you have a “smart” trainer or other device that only communicates with the Ant+ standard, you need some way to convert Ant+ to BLE (Bluetooth Low Energy). This is the device that does that - in fact that’s what "CABLE" stands for. Check the website below for the extensive hardware compatibility list. Then download the CABLE App, make the connection and start Zwifting!