This connects the device to your Apple ID and makes it visible in the “Find My” app
Apple has outfitted the device with Bluetooth for proximity detection, its in-house U1 chipset for Precision Finding, and NFC for interacting with iPhones.
With a clear line of sight, the iPhone’s Bluetooth connection works perfectly in the previously mentioned range.
if you have an iPhone 11 or later with an U1 chip, Precision Tracking is available in the Find My app as the “Find Nearby” option.