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Specifications
Battery type Rechargeable, built-in lithium-ion battery
Forerunner 245 battery life, watch mode
Up to 7 days with activity tracking, smartphone notifications, and
wrist-based heart rate
Forerunner 245 battery life, activity mode Up to 24 hr. with GPS and wrist-based heart rate
Forerunner 245 Music battery life, watch
mode
Up to 7 days with activity tracking, smartphone notifications, and
wrist-based heart rate
Forerunner 245 Music battery life, watch
mode with music
Up to 8 hr. with activity tracking, smartphone notifications, wrist-
based heart rate, and music playback
Forerunner 245 Music battery life, activity
mode
Up to 24 hr. with GPS and wrist-based heart rate
Forerunner 245 Music battery life, activity
mode with music
Up to 6 hr. with GPS, wrist-based heart rate, and music playback
Water rating Swim, 5 ATM
1
Forerunner 245 Music media storage 3.5 GB (approximately 500 songs)
Operating temperature range From -20º to 60ºC (from -4º to 140ºF)
Charging temperature range From 0º to 45ºC (from 32º to 113ºF)
Forerunner 245 radio frequency/protocol
2.4 GHz @ 2 dBm nominal
• ANT+ wireless communications protocol
• Bluetooth 4.2 technology
Forerunner 245 Music radio frequency/
protocol
2.4 GHz
• @ 2 dBm nominal ANT+ wireless communications protocol
• @ 10 dBm nominal Bluetooth 4.2 technology
• @ 13.6 dBm nominal Wi‑Fi wireless technology
Troubleshooting
Product Updates
On your computer, install Garmin Express (www.garmin.com/express). On your smartphone, install the Garmin
Connect app.
This provides easy access to these services for Garmin devices:
• Software updates
• Data uploads to Garmin Connect
• Product registration
Setting Up Garmin Express
1 Connect the device to your computer using a USB cable.
2 Go to www.garmin.com/express.
3 Follow the on-screen instructions.
1
The device withstands pressure equivalent to a depth of 50 m. For more information, go to
www.garmin.com/waterrating.
70 Troubleshooting
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