The SYNC heart rate soft strap is the perfect way to monitor your level of fitness intensity at any moment. Electro cardio gramme accurate heart rate data is wirelessly transmitted via bluetooth smart technology to your device. SYNC is also integrated with map my fitness, you can store, view and share all your heart rate information at any point. Continuous heart rate transmission. Washable soft strap. Bluetooth smart technology, compatible with iPhone 4S & 5 (not included). Suitable for walking, running and the gym. Ideal for cardiovascular exercise. Coded transmission. One button operation. ECG accurate display. Average and maximum training heart rate. Manual target zone - bpm. Automatic age-based target zone - bpm. Heart rate recovery time. No chest belt required. Batteries required: 1 x C batteries included. EAN: 95121301518.