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Garmin Forerunner 645 Music Smart Watch - Black151/3936

Rating 4.333333333333333 out of 5
Read reviews (6)
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  • £274.99

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About this product

With Garmin Forerunner 645 Music, every run is a performance. This GPS running watch stores up to 500 songs and includes Garmin Pay contactless payment solution, so you can leave your phone and wallet at home. Fine-tune your training with wrist-based heart rate, advanced running dynamics and performance monitoring features that evaluate your training and recovery. You can even customise your watch by downloading free watch faces, apps and more from the Connect IQ store and stay linked to what matters with a variety of connected features.

You can sync your carefully crafted playlists from select music streaming services, like Deezer, Spotify and more, to your watch for more ad-free listening. Wrist-based heart rate provides performance monitoring features, including evaluating your current training status.

Includes smart notifications plus the ability to send prewritten responses to text messages (Android only), automatic uploads to Garmin Connect and the ability for others to track your runs with the LiveTrack feature.

The running sports are just the beginning, because there is also built-in support for cycling, pool swimming, row, elliptical, cardio and lots more. Get health and fitness monitoring features such as sleep and stress tracking and Garmin Connect menstrual cycle tracking feature.


  • Proprietary operating system.
  • Bluetooth 4 connection.
  • NFC connection.
  • Wi-Fi.

Display information

  • 30.4mm Memory-in-pixel (MIP) screen.
  • 240 x 240 screen resolution.


  • 180mAh battery capacity.
  • Typical usage time of up to 7 days.
  • Low usage time of up to 7 days.
  • 2 hour charge.
  • Replaceable battery.

Physical specification

  • Size: one size.
  • Watch size H42.5, W42.5, D13.5mm.
  • Strap size L222, W20, T2mm.
  • Strap can be removed and replaced.
  • Weight 42.2g.


  • Water resistant.
  • Swimproof.
  • Dust resistant.
  • Scratch resistant.
  • Read texts.
  • Receive social network notifications.
  • View calendar.
  • Displays weather.
  • Music player.
  • Heart rate monitor.
  • Pedometer.
  • Distance.
  • Accelerometer.
  • GPS.
  • Calories.
  • Sleep.
  • Accessories included: Charging Cable and Documentation, including charger.
  • Manufacturer's 2 year guarantee.
  • EAN: 753759185138.

The small print

*Prices correct as displayed but are subject to change.

The customer and brand answers you’ll see above are submitted independently. As we don’t review these answers, we can’t take responsibility for anything they may say. The responses from Argos colleagues are accurate at the time of publishing. For the latest info, you should check the product page.

This product comes with a minimum one year manufacturer’s guarantee, unless otherwise stated in the specification above.