The Polar H7 heart rate sensor provides live heart rate on your mobile training application, so you can make the most of every session. In addition to low energy Bluetooth smart technology, the H7 heart rate sensor uses coded 5 kHz transmission to connect with the majority of Polar training computers on the market and with compatible gym equipment. The soft fabric chest strap seamlessly adapts to your body shape, bringing full freedom of movement to your training.

Features:

• Uses Bluetooth smart technology and coded 5 kHz transmission, providing ECG-accurate heart rate to any Bluetooth smart ready device and compatible Polar training computers
• Makes it quick and easy to add heart rate to your smartphone
• Long transmission range (~10m)
• User replaceable battery
• Includes a soft and comfortable hand washable fabric chest strap
• Compatible with iPhone 4S