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.
• 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
