Timex Ironman Watch

The Timex Digital Speed & Distance Sensor provides distance, pace and speed data in English, metric and nautical units (with compatible watch), and no calibration required since the Timex Digital Speed & Distance Snsor uses a highly accurate GPS tracking system. The Timex Digital Speed & Distance Sensor has a 13-hour battery life from 1 AA battery (included)**, and is Splash-resistant to IPX7 standard. Works with all Timex Ironman Triathlon Bodylink and Speed + Distance System watches Measures distance, pace and speed data in English, metric and nautical units (with compatible watch) No calibration required Wear on upper arm or waistband (elastic strap and belt clip included) 13-hour battery life from 1 AA battery (included)** Splash-resistant to IPX7 standard **Battery life estimates are based on certain assumptions regarding usage: battery life may vary depending on actual usage. Shipping Weight: 0.5 lbs.

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