Learn how to use your Forerunner 645 device. This GPS running watch stores up to 500 songs (Forerunner 645 Music only) and includes Garmin Pay™ contactless payment solution¹, so you can leave your phone and wallet at home. Fine-tune your training with wrist-based heart rate², advanced running dynamics³ and performance monitoring features. To learn more about Forerunner 645, click here [
•Easily download up to 500 songs to your watch, and connect with Bluetooth® headphones (sold separately) for phone-free listening (Forerunner 645 Music only).
•Syncs music from select streaming services for offline listening (Forerunner 645 Music only).
•Garmin Pay™ contactless payment solution¹ (coming soon) 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.
• Evaluates your current training status to indicate if you’re undertraining or overdoing it; offers additional performance monitoring features.
• Battery life⁴: up to 7 days in smartwatch mode; 5 hours in GPS mode with music.
¹View current supported country, payment network and issuing bank information
²Activity tracking accuracy
³When used with Running Dynamics Pod or HRM-Run™ or HRM-Tri™ monitor (sold separately)
⁴Under typical use; battery life will vary depending upon usage and selected performance mode
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