Polar G1 GPS Sensor for Polar FT60, FT80 & RS300X Fitness Watches

Use the Polar G1 GPS Sensor for Polar FT60, FT80 & RS300X Fitness Watches to measure your speed/pace and distance using GPS for outdoor sports like running and cycling. The Polar G1 sensor determines your location by measuring continuously the distance between itself and at least four satellites. The sensor uses wireless transmission technology to transmit speed and distance data to your separately sold Polar FT60, FT80, or RS300X fitness watch which records and displays the data. The G1 is water resistant for use in virtually any weather and conditions, and is powered by one AA battery. In addition to the sensor unit, an armband is included.