for 6 6s KUNER power case Ultra Slim Extended Battery Case for iPhone 6/6s (4.7 inch) with 2400mAh Capacity power bank (White) Perfectly fits for your devices. easy to take ,very think , really light . instead of take a heavy power bank . Selecting and using the top-level aluminum , Uttermost reduce the effrect of the signal. Style--Luxury & Vintage & Fashion & Durable. It's not only a case cover ,but also a 2400mAh power bank