If you have an indoor bike but it is not Bluetooth enabled then you can still get connected to CicloZone sessions. Our COL% works by connecting a simply RPM sensor to the pedal crank arm of your bike and connect a Bluetooth HR monitor for the zones. Our Ciclo Ai will realise you are riding with HR and not Power zones and calculate the zones accordingly. Below are a couple of example Amazon links for sensors to get you connected. Bike cadence sensor https://amzn.eu/d/dF3Jnaj HR Sensor Magene https://amzn.eu/d/aMUdOAG