This advanced training watch with high-sensitivity GPS is designed for the dedicated runner who wants to accurately catalog every workout. It tracks time, distance and pace. It also monitors your personal records, such as fastest mile or longest run. Auto Pause feature automatically stops the watch when you stop moving; great for runs where you have to stop often. Run/Walk mode lets you program the watch for workouts that call for running and walking.

The HRM-Run provides your heart rate and real-time feedback about your running form. It has an accelerometer that measures torso movement to calculate three running metrics: cadence, the number of steps per minute; vertical oscillation, the bounce in your running motion; and ground contact time, the amount of time in each step your foot spends on the ground (measured in milliseconds). A color gauge makes it easy to see how your running dynamics compare to other runners.

The 620 can estimate your VO2 max, which is a measure of your body's ability to take in oxygen. The higher your V02 max, the faster and longer you can run. Knowing it is a great way to measure your physical fitness, improve your performance and set goals.

A color gauge on the watch shows how your VO2 max compares to other runners of your gender and age. Using your VO2 max, the 620 can predict your race times for several distances, assuming you're doing the proper training.

A built-in accelerometer allows you to capture distance and data when you're running on an indoor track or treadmill, without the need for a separate foot pod accessory.

Use the free Garmin Connect Mobile app on your smartphone and then pair it with your watch. When you save your run, it will automatically upload to Garmin Connect when you're in range of your phone. You can also share your stats via social media.

LiveTrack feature allows your friends to follow each run in real time – you must have your phone paired with the 620 throughout your run. For real-time coaching as you run, it's compatible with free training plans at Garmin Connect. Each time you connect to Garmin Connect, your watch will automatically receive satellite data, resulting in a faster GPS fix. Water resistant to 50 meters. Rechargeable lithium ion battery can be charged with the included USB cable. Imported.

Unit dimensions  1.8"H x 1.8"W x 0.5"D.

Display size  1" diam.

Weight  1.5 oz.

Display resolution  180 x 180 pixels.

Battery type  Rechargeable lithium-ion.

Battery life  10 hours in training mode, up to 6 weeks in watch mode.

Compatibility  Windows? XP or newer and Mac? OS X 10.4 or later.