There are several ways to use the heart rate monitor. The S4 performance monitor shows your heart rate as soon as you use a corresponding transmitter and receiver and connect them to the S4 performance monitor.
1. A cable is attached to the side of the monitor and the receiver is placed in the middle under the device. The heart rate is transmitted analogously.
2. The S4 performance monitor is expanded with a circuit board that receives digital heart rate signals (ANT+).
3. You use the ComModule or the SmartRow app. The heart rate is received via Bluetooth.