TrackRs are Bluetooth devices. You can use the app to ring your TrackR when you are within Bluetooth range.
If you lose an item away from home, you can enable Crowd Locate notifications. Below is a visual guide in turning on your Crowd Locate Notifications.
When out of Bluetooth range, your TrackR app will display the 'Last Seen' location of your item, and you can enable Crowd Locate Notifications from this view.
Questions? Contact Support!