Forerunner® 645 Music

GPS Running Smartwatch with Music and Contactless Payments                  

• Easily download up to 500 songs to your watch, and connect with Bluetooth® headphones (sold separately) for phone-free listening
• Syncs music from select streaming services for offline listening¹
• Garmin Pay™ contactless payment solution² lets you make convenient payments with your watch, so you can leave your cash and cards at home
• Provides advanced running dynamics³, including ground contact time balance, stride length, vertical ratio and more
• Uses wrist-based heart rate⁴ to offer performance monitoring features, including evaluating your current training status
• Battery life⁵: up to 7 days in smartwatch mode; 5 hours in GPS mode with music

Music

With up to 500 songs worth of music storage built right into your watch, we’re putting the “beat” in your daily mission to beat yesterday. It’s easy to transfer music from your computer and then queue up your favorite playlist for easy listening through Bluetooth headphones. 

Paying Made Easy

Always on the run? Feel free to leave your phone and wallet behind. Forerunner 645 Music features Garmin Pay contactless payment solution,² which lets you pay for purchases with your watch. Use it just about anywhere you can tap your card to pay. A bottle of water here, a bite to eat there — just pay, and keep on moving.

Tune up Your Training

We’re making it easier to get the data you need to improve your form. Let Forerunner 645 Music measure crucial running metrics³ that you can use to analyze your performance. Biomechanical measurements³, such as cadence, stride length, ground contact time and balance, vertical oscillation and vertical ratio, are the key to understanding your form so you can bring your best on race day.

Monitor Your Performance

Just how effective is your current training plan? Forerunner 645 Music will help you monitor your training and recovery so you can better prepare for a race or training cycle. Training status is a performance monitoring tool that automatically evaluates your recent exercise history and performance indicators to let you know if you’re training productively, peaking or overreaching. The anaerobic training effect metric opens a window of insight to a critical dimension of training, telling you how your training is improving your ability to push the limits. 

More Ways to Customize

Check out the Connect IQ™ store, where you can add personality to Forerunner 645 Music by downloading apps, widgets, watch faces and more. It’s easy and — even better — it’s free. New apps are added every day.

 

Stay Connected on the Run

Forerunner 645 Music makes it easy to run without leaving important smart features behind. Once paired with your compatible smartphone, you’ll be able to receive and even respond⁷ to text messages and see social media updates, emails and more right on your wrist.

Share and Compete

Syncing your activities to Garmin Connect is for more than just storing your data. Garmin Connect™ is a thriving online community where people on the go can connect and compete by joining challenges, encourage each other’s successes and even share their triumphs via social media.

Train Your Way

Your routine is anything but routine. Forerunner 645 Music lets you change things up with ease, thanks to built-in activity profiles for running (indoor/outdoor), cycling (indoor/outdoor), swimming (pool), elliptical, paddle sports, strength training and many more.

Love the Look

Designed for runners, Forerunner 645 Music features a reliable five-button interface that lets you mark laps with a quick press. Feel free to take this watch outside in all kinds of weather. Not only is it safe for swimming and showering, its Garmin Chroma Display™ is easy to read — even in direct sunlight — and housed under chemically strengthened glass. When you want to change it up, swapping bands is fast and doesn’t require tools.

Choose From Millions of Tracks

You’ll never get bored with your running playlist when you can change it up anytime. Forerunner 645 Music is compatible with some of your favorite streaming services — and more are being added all the time.

Track Your Cycle

Get a better understanding of your body using the Garmin Connect menstrual cycle tracking feature. Use it to track cycle details, log physical and emotional symptoms and record personal notes for regular, irregular and menopause transition cycle types. You’ll get education about training and nutrition during each phase of your current cycle, too.

Safety and Tracking Features

Forerunner 645 Music provides safety and tracking features to help provide a little extra peace of mind for you and your loved ones. If anything should happen — and your watch is paired with your compatible smartphone⁹ — hold the light button down until you feel the watch vibrate 3 times. This activates the assistance feature, which discreetly sends a message with your real-time location to your preloaded emergency contacts. That way, help has an easier time finding you.