polar rs400

RS400 For the endurance spots athlete. You want to improve your performance also between training routines -- by planning, monitoring and analyzing your training.

Don't just go out for a run. Analyze it with the Polar RS400 Heart Rate Monitor.

RS400sd For the active runner who runs multiple events each year.

GPS technology is now available to more runners and cross-trainers Provides ability to track running speed and distance Compatible with RS200, RS400, .S625X and S725X .Training ...