I obtained this previously at an auction and played with it on my phone and a friend's phone before leaving it unused. It's a magic trick where when you send power, it beeps, your phone flashes, and the screen also flashes. The explanation is in Chinese with English subtitles. Compatible Models & Requirements Compatible with iPhone only (iPhone 10 or later) Requires iOS 13 or later Not compatible with Android This is a magic trick that applies black technology to mobile phones. This is at your own risk, and no claims or returns will be accepted.