Click on your username near the top-right corner of the screen and select My Account.
From this screen, you can edit the STATION NAME, view which version of the POS app is running on each device, and deactivate devices you are no longer using.
The DEVICE NAME is the actual name of the iOS device. To update this name:
Tap the Settings icon to open the Settings app.
Tap General > About > Name.
Enter a name for the device and tap the Done button.