Indicates whether the model employs a chest strap mounted sensor that transmitts to a watch ... continuous heart rates from the user's wrist. The Polar FT1 is part of the Heart-rate monitors ...

There are three types of heart rate monitors: Buy at Amazon.com Buy at Walmart.com Very accurate Excellent battery life ...

heart rate, and track your sleep patterns to gain valuable insights. The watch records deep sleep, light sleep, and awake duration. providing a comprehensive analysis of your sleep quality to help ...