Polar RS300X Heart Rate Monitor Computer Watch

What are the delivery costs?

We offer Free UK Mainland Delivery on all orders over £20. Products shipped to outlying UK regions are excluded from free shipping.

Standard delivery is normally 2 - 5 working days.

Please view our delivery page for full information on UK and international delivery costs.

For recreational athletes who require all essential heart rate and timing features
  • Helps you train at the right intensity with personal sport zones
  • Displays calories burned
  • The Polar Fitness test measures your aerobic fitness at rest and tells you your progress
Fitness Test
  • Tells you exactly how your fitness is developing
Training Load
  • Shows you how your training affects your body
OwnZone
  • Guides you to train at the right intensity
Smart Calories
  • Lets you know exactly how many calories you’ve burned
In the box:
  • Polar RS300X training computer
  • Polar WearLink®+ transmitter
  • Manual


Occasionally, without notice, manufacturers change product design and/or specifications.