Locate an AirTag or other item in Find Items
You can use the Find Items app 
on your Apple Watch to locate a missing AirTag or third-party item that you’ve registered to your Apple ID.
See the iPhone User Guide to learn how to set up an AirTag on your iPhone and add or update a third-party item in Find My on iPhone.
See the location of an item
Open the Find Items app on your Apple Watch, then tap an item you want to find.
If the item can be located: It appears on the map so you can see where it is. The device’s approximate distance, time it last connected to Wi-Fi or cellular, and charge level appears above the map. An approximate location appears below the map.
If the item can’t be located: You see where and when it was last located. Under Notifications, tap Notify When Found, then turn on Notify When Found. You receive a notification once it’s located again.
Play a sound
If the item is nearby, you can play a sound on it to help you find it.
Note: If you can’t play a sound on an item, you won’t see the Play Sound button.
Open the Find Items app
on your Apple Watch, then tap the item you want to play a sound on.Tap Play Sound.
To stop playing the sound before it ends automatically, tap Stop Sound.
Get directions to an item
You can get directions to an item’s current or last known location in the Maps app 
on your Apple Watch.
Open the Find Items app
on your Apple Watch, then tap the item you want to get directions to.Tap Directions to open Maps.
Tap the route to get directions from your current location to the item’s location.
Receive a notification when you’ve left an item behind
To help keep you from misplacing your items, you can receive a notification when you’ve left them behind. You can also set Trusted Locations—locations where you can leave your item without receiving a notification.
Open the Find Items app
on your Apple Watch.Tap the item you want to set up a notification for.
Tap Notify When Left Behind, then turn on Notify When Left Behind.
You can also open the Find My app on your iPhone, tap Items, tap the item you want to set up a notification for, then tap Notify When Left Behind. Turn on Notify When Left Behind, then follow the onscreen instructions.
If you want to add a Trusted Location, you can choose a suggested location, or tap New Location, select a location on the map, then tap Done.
Change distance units
Open the Find Items app
on your Apple Watch, then turn the Digital Crown to scroll to the bottom of the screen.Tap “Distance in,” then choose miles or kilometers.
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