Garmin Forerunner 305 Personal GPS Receiver with Heart Rate Monitor The Forerunner 305 includes a high sensitivity GPS receiver, new courses feature and robust wireless heart rate monitor for optimal performance. Forerunner 305 sports a unique design that wraps the GPS antenna around part of the wrist for a better view of the sky, and its high sensitivity GPS receiver provides improved tracking under trees and near tall buildings. Forerunner 305 also sports a robust ANT wireless heart rate monitor with softer, more comfortable chest strap and superior battery life. It eliminates crosstalk with other devices to reliably measure and send heart rate data, and it helps you train in your optimal heart rate zone. Forerunner 305's courses feature lets you compete against previous workouts you can compare your pace and heart rate to your past performance over the same run. You also can use Forerunner 305 to train for your next duathlon or triathlon with multisport workouts, a feature that lets you seamlessly transition between sports without resetting the unit, so you can use it for running, biking and more. Train indoors and still track your distance, pace and calories burned with the optional Foot Pod accessory. This wireless sensor attaches to your running shoe and transmits distance and pace data to your Forerunner 305 so you can still use it when GPS reception is unavailable. You can customize any of Forerunner 305's three main data screens up to 12 data fields give you instant feedback on your workout. And, as with every Forerunner, each workout is stored in memory so you can review and analyze the data and see how you've improved over time. As an added benefit, you can plan, analyze and store data from your workouts through our online community, Garmin Connect, or our free Garmin Training Center software. Conveniently upload your data to Garmin Connect for an indepth analysis of your workouts, online mapping and route sharing