Polar H7 heart rate sensor gives you live heart rate on your mobile training application, to 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.
Compatible with dozens of leading fitness apps, including Polar Beat
Compatible with iPhone 4S and later, and with selected Android devices including Samsung Galaxy S3 and S4 using Android 4.3 or later.
Transfers heart rate information while swimming with products which support 5 kHz transmission