Ironman Triathlon Bodylink Performance Monitor and Timex Speed + Distance Sensor
Works with highly accurate GPS satellite tracking system Includes adjustable arm strap and belt clip
Continuous odometer English, metric or nautical units
Automatic time correction No calibration necessary 99% distance accuracy in environments with a clear view of the sky (better than 95% distance accuracy in most other environments)
Sensor ˇ§C Splash-resistant
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