What are the accessories behind the iPhone in the store?

I went to the iPhone store and found something attached to the back of the iPhone and a line was connected.

It feels like I'm connected to a charger

What is this?

400 2017-04-03 Gentleman

popular How can I connect to watch a video on my phone on TV?

popular Do oats also have side effects?

popular What is the deadline for purchasing lotto?

popular Is hair spray not allowed on the plane at all?

popular Why does it say that your license has expired on your phone?

Same Tag Please recommend an application for drawing on your smartphone

Same Tag Is there an application that feels like a blind date?

Same Tag Why won't I get a call if I set the normal phone as a shortcut?

Same Tag Is there an application where I can talk to foreigners?

Same Tag How do I watch DMB on my phone?

Same Time Is there a way to prevent the earphone wires from getting tangled?

Same Time What are the accessories behind the iPhone in the store?

Same Time It opened next to the iPhone 6 Plus case, should I get it as?