How to Guide

Do not store the device where prolonged exposure to extreme
temperatures can occur, because it can cause permanent
damage.
Cleaning the Device
NOTICE
Even small amounts of sweat or moisture can cause corrosion
of the electrical contacts when connected to a charger.
Corrosion can prevent charging and data transfer.
1
Wipe the device using a cloth dampened with a mild
detergent solution.
2
Wipe it dry.
After cleaning, allow the device to dry completely.
TIP: For more information, go to www.garmin.com/fitandcare.
Replacing the Bands
The device is compatible with 20 mm wide, standard, quick-
release bands. Go to buy.garmin.com, or contact your Garmin
dealer for information about optional accessories.
1
Slide the quick-release pin on the spring bar to remove the
band.
2
Insert one side of the spring bar for the new band into the
device.
3
Slide the quick-release pin, and align the spring bar with the
opposite side of the device.
4
Repeat steps 1 through 3 to replace the other band.
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*
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
*The device withstands pressure equivalent to a depth of 50 m.
For more information, go to www.garmin.com/waterrating.
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.
Getting More Information
• Go to support.garmin.com for additional manuals, articles,
and software updates.
• Go to buy.garmin.com, or contact your Garmin dealer for
information about optional accessories and replacement
parts.
• Go to www.garmin.com/ataccuracy.
This is not a medical device. The pulse oximeter feature is
not available in all countries.
Activity Tracking
For more information about activity tracking accuracy, go to
garmin.com/ataccuracy.
My daily step count does not appear
The daily step count is reset every night at midnight.
If dashes appear instead of your step count, allow the device
to acquire satellite signals and set the time automatically.
My step count does not seem accurate
If your step count does not seem accurate, you can try these
tips.
• Wear the device on your non-dominant wrist.
• Carry the device in your pocket when pushing a stroller or
lawn mower.
• Carry the device in your pocket when actively using your
hands or arms only.
NOTE: The device may interpret some repetitive motions,
such as washing dishes, folding laundry, or clapping your
hands, as steps.
The step counts on my device and my Garmin
Connect account don't match
The step count on your Garmin Connect account updates when
you sync your device.
Troubleshooting 27