The Smart Battery Case, designed specifically for the iPhone 11 Pro Max, extends battery life while also providing excellent protection. A silky microfiber lining keeps your iPhone safe on the inside. On the outside, the silicone exterior's velvety, soft-touch surface is a pleasure to hold. The case is easy to put on and take off thanks to a soft elastomer hinge. Buy iPhone 11 Smart Case with Bitcoin and extend the life of your iPhone.