[Smart Return & Confirm Key] iPhone 6S Screen Protector, Kollea Premium Ballistic Nano Tempered Glass Screen Protector W Invisible Return Button & Confirm Button for iPhone 6 6S 4.7" Please be noted all Tempered Glass screen protectors won't be able to cover full screen because of iPhone's edge design to prevent edge lifting and air bubbles forming. A dedicated physics processing technology and no need to install any software, [Return Key] is designed for the simplest and most straightforward way of going back to the previous screen, and a [Confirm Key] is designed to use the function on top right corner in most APPs; Tempered glass and unique anti-oil processing makes fingerprints and oil not easy to stay on the surface and easy to clean, ultra-clear and return button is invisible with high sensitivity touch; Made of a distinctive circuit and automatically connect with two key functions to the device, [Return key] on the lower left corner corresponds to the function on top left corner and [Confirm key] on the lower right corner corresponds to the function on top right corner on the screen; A iPhone 6 4.7" smart screen protector make the device easier to use with one hand, liberation of your hands and reduce the chances of your screen breaking when you use it; there is a smart connection between the protector with the device of the two invisible key. The [Return button] works when there is App's Return icon on top left corner. If there is no Return icon on the phone's top left corner, the 'Return button' can NOT do its work. The [Return button] is placed in the lower left corner of the device where is the on-screen return button resides on Android Smartphones. Also you can use the lower right invisible [Confirm button] to reach lots of function corresponds to the top right corner in APPs. product is build-in a special circuit, connects the device space of the lower left corner and lower right corner with the top left corner and top right corner on the screen, where are the position of most IOS APP for Back Button and Confirm Button; so it only functional when iPhone is held in hand. If there are many icons on top right postion, the smart screen protector might be a little confused, and please hold the phone steady at the hand and click the screen with a larger contact surface.