The Polar F7 Heart Rate Monitor is the one you want for effective training and features the sophisticated Wearlink+ transmitter and the convenience of a user-changeable battery.
Depending on your body's daily condition, you might benefit from either a low- or high-intensity training session.
The Polar F7 Heart Rate Monitor checks your daily condition and guides you to a suitable intensity.
If you want to be sure that you are training for the best improvement for your current condition, the Polar F7 Heart Rate Monitor is the right one for you.
Polar exercise features