In addition to protecting the phone, many of todays mobile phone cases have some auxiliary functions. However, they are generally bulky in appearance or have too ordinary auxiliary functions, making it difficult to attract attention. peoples attention. Recently, a wireless passive incoming call light-on smart phone case in Ukraine has attracted a lot of attention. It does not require any interface on the iPhone, nor does it require any external power supply. The corresponding icon on the back will light up whenever there is an incoming call or text message. It converts the electromagnetic waves emitted by the mobile phone into electrical energy to power the LED lights of the corresponding icons. It is essentially different from the previous flashing stickers for incoming calls, and it is thin and light enough.
