For Apple Watch Series 1 42mm Screen replacement.Fixes various problems that occur with the screen. The kit includes: 1* for Apple Watch Series 1 screen. 1 * Repair Tools. Installation Notes: 1.Before replacing the Watch Series 1 screen, please switch off your smartwatch and remove the battery. 2.It is recommended to test the screen pre-installation. Please start the smartwatch after connecting the cable between the screen and thesmartwatch to initially test whether the new screen can be displayed normally. 3.The LCD screen is a fragile product, please install it carefully and do not bend the cable excessively. Also, please pay attention to the static electricity problem. Installation Tips: If you have no experience in replacing the screen, please find a professional technician to help you replace the screen. If you decide to replace the screen by yourself, we strongly recommend watching the related installation video tutorials before installation.There are many related installation videos on Youtube website for your reference.