Slim & Light & Portable??- About half size of the phone and only 9mm thickness, 75g weight. You hardly see or feel it when plug it into your phone and put it into your pocket. No need cable to charge your phone, just plug the battery case into the phone??s charging port. You??ll never be worried about the low battery and say goodbye to the clumsy power bank and messy data cable.? Compatibility?? Compatible with iPhone (except 5C) including iPhone 11 (Pro/pro max) / iPhone X (XS,XS MAX, XR), iPhone 8 (Plus) /7(Plus)/6 (Plus)/6s (Plus)/5, iPod and iPad which with Lightning interface. LED battery Level Indicator and On/Off button in One??- Charge the phone automatically as soon as plug it into the phone. Press the On/Off button for 3 seconds to switch on the quick charging mode. The different colors of the LED light indicate different battery level: Blue color indicates 100%-70% power; Purple color indicates 69%-30% power; Red Color indicates 29%-0% power Works with Thin Phone Case??- Due to the special design of this product, it just works with a thin phone case ??1mm thickness. If the gap is too large, it will makes the battery case too loose to be attached to the phone. We have the compatible phone cases for sale. 100% Refund Guarantee ??We are committed to providing a 12-months warranty, a 90-Days Free exchange or refund service. Please contact us if you have any questions, and we will deal with it within 24 hours.