Garmin Forerunner 301 GPS unit with heart rate monitoring and speed and distance. The Garmin ForeRunner 301 offers athletes an easy-to-read display, ergonomic wristband, and integrated Garmin GPS sensor that provides precise speed, distance, and pace data (expected accuracy in excess of 96%, can be as high as 98%, depending on environment). It's a compact, lightweight, accurate training assistant with performance tracking, auto-lap, auto-pause and more. The Garmin Forerunner 301 is easy to use right out of the box and delivers the benefits of GPS technology at an affordable price. The Garmin ForeRunner 301 uses a digital heart rate transmission system to prevent unwanted interference from other HRM users.