Važnost stres ćaskati polar belte batteri Emulirati govore Predrasuda
Review: Polar Verity Sense Optical Heart Rate Sensor | road.cc
PolarGlobal on Twitter: "Today we've launched a new heart rate sensor: Polar H9! - Bluetooth, ANT+ and 5 kHz technologies - Battery life of 400 hours - Compatible with Polar Club Discover