The Samsung Galaxy S20 LED Back Cover is a multifunctional case that shows you LED notifications on the back side of the Cover. The back cover LED lights will notify you of incoming calls, messages and more. Countdown Timer- the LED shows a countdown on the rear, so you know exactly how much time you have to pose before the photo is taken. Mood Lighting- when you turn your Galaxy over on its front, the LED Back Cover lights fade in and out like a light show.