4 Ear Clip Sensor. Connect to the USB heart rate box. Connect to sports machines: Stepper, Treadmill, etc. Connect to for iOS/Android phones with receiver.
Bumdenuu Cardio EAR CLIP Heart Rate Pulse Meter Sensor for KETTLER Cardio Fitness Equipment Accessories Heart Rate Monitoring
Bumdenuu Cardio Ear Clip Heart Rate Monitor Sensor for KETTLER Cardio Fitness Equipment Accessories Heart Rate Monitor
Cardio EAR CLIP for KETTLER Cardio Fitness Equipment Heart Rate Monitoring
Cardio EAR CLIP Heart Rate Pulse Meter Sensor for Cardio Fitness9677
Cardio EAR CLIP Heart Rate Pulse Meter Sensor for Cardio Fitness5593
Cardio EAR CLIP Heart Rate Pulse Meter Sensor for Cardio Fitness5172
