The device includes an indoor activity profile where GPS is turned off. You can turn off GPS when you are training indoors or to save battery life.
NOTE:Any change to the GPS setting is saved to the active profile.
Select
Menu > Settings > Activity Profiles.
Select a profile.
Select
GPS Mode > Off.
When GPS is turned off, speed and distance are not available unless you have a compatible sensor or indoor trainer that sends speed and distance data to the device.