…accordingly. Select and monitor your training intensity with personal training zones and further plan, monitor and analyze your training with the Polar ProTrainer 5 software.

The RS400sd has all the same advanced running features as the RS400 but with a few extras. With the addition of the compatible foot pod which comfortably attaches to your running shoe laces, you can accurately and wirelessly measure speed, distance and pace, as well as the level of your performance.

When it comes to your training, it?s all about the detail. Like being able to personalize every aspect of your workout. The RS400 meets all these elements head on by helping you plan, monitor and analyze each training session.