The product supports Android and Apple systems. This product transmits the location of the nearby positioning device to the Apple Cloud server through the Apple device (myself or a stranger), and sends the location of the positioning device to Apple to find me by coding (if there is no Apple device nearby, or the Apple device does not turn on Bluetooth, the positioning will not be updated. The more Apple devices are used near the positioning device, the faster and more accurate the location update will be. If there are few Apple devices nearby, the remote location update will not be frequent or even updated)