Polar H7 Bluetooth Smart Heart Rate Sensor Take your fitness to the next level by tracking your heart with the Polar H7. This combination heart rate sensor is Bluetooth Smart Heart Rate Sensor. It can provide live, accurate heart rate to your mobile training app, including Polar Beat, turning it into a smart training companion. Also connects to many Polar products as well as compatible gym equipment. Compatible with iPhone 4S, iPhone 5, iPod touch (5th generation), iPad (3rd & 4th generation), iPad mini, and iPod Nano (7th generation).