The HRM-Pro is the top of the line Garmin heart rate monitor. What can it do? An in-depth review.
An iteration of the OH1, Polar addressed some usability issues and increased the range.
So Wahoo Fitness released the Tickr series with the Tickr, the Tickr Run, and the Tickr X. All of these chest strap heart rate monitors have dual functionality, in means that they support both ANT+ and Bluetooth.