The most unique feature of this phone case is the built-in memory expansion which allows you directly edit your file in external SD card without downloading to your phone. Sound incredible, right? Adopting premium PC and TPU materials, it ensures good quality and softness. It can well protect your device from any potential damage. It offers an extra 256G capacity for data storage. This phone case is lightweight for easy installation. Come and try!<!--Features --><p>FEATURES</p><ul><li> Suitable for iPhone 6/6S/7</li><li> Free APP provided; you need to download "U-sisk" from APP Store for the first time use</li><li> 2 in 1 case with hard PC material and soft TPU protects your phone from any scratch, drop and shock</li><li> Special design can get better heat dissipation than battery case</li><li> The back case has built-in good quality and high speed chipest, which makes 3.0 data transfer speed</li><li> You can edit your file directly in external SD card, no need to download to your iPhone at first</li><li> Up to extra 256G capacity, you can get 128,000 high-definition photos, 250 super clear movies or 56,000 HQ music </li></ul><!--Specifications --><p>Specifications</p><table width="100%" border="0" cellpadding="0" cellspacing="0"><tbody><tr><td width="131"> Color</td><td width="365"> Black</td></tr><tr><td width="131"> Dimensions</td><td width="365"> (5.86 x 2.87 x 0.39)" / (14.9 x 7.3 x 1)cm (L x W x H)</td></tr><tr><td width="131"> Weight</td><td width="365"> 1.41oz / 40g(Adapter Included) </td></tr><tr><td width="131"> Material</td><td width="365"> PC & Soft TPU</td></tr><tr><td width="131"> Suitable for</td><td width="365">iPhone 6, iPhone 6S and iPhone 7</td></tr><tr><td width="131"> Storage</td><td width="365"> Up to 256G(SD Card is Not Included) </td></tr></tbody> </table><!--Package Includes --><p>Package Includes</p><ul><li>1 x Wireless Expansion Phone Case</li></ul><!--Extra Info --><!--produts_compatibility -->