Timex SPS - 3D GPS Sensor 5F891

Works with any Timex Body Link Monitor
 Free Shipping w/Timex heart monitor purchase

Speed + Distance Sensor features 

• GPS unit is worn on arm or belt
• Adjustable elastic strap and belt clip included
• Works with highly accurate GPS satellite tracking system
• 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) 
• Works with all Timex^® Ironman Triathlon^® Bodylink^® and Speed + Distance System watches
• Provides distance, pace and speed data in English, metric and nautical units (with compatible watch)
• 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.}