Improve your safety with the ARadar app! Connect your Garmin Varia™ (only models with bluetooth!) to your Apple Watch directly without using iPhone or any other Garmin device (no needs for a Garmin Watch or a Garmin cyclocomputer anymore!) Its the perfect companion for every bike commuter! Also Bryton Gardia R300 is compatible! It will vibrate and ring the Apple Watch when an object is approaching and you can have also Voice Feedback! You will see also statistics about overtaking during the ride! The app also save workouts (heart rate and gps information) to Health App and Strava! Other features: - Cadence sensor auto connection supported - Mirror view on your iphone ARadar is not affiliated with or endorsed by any subscription service or maker of exercise equipment.