Safe to use and no consumption: No built-in battery, no need to worry about overheating, no need to worry about damage, just use NFC transmission through the app, the image will remain displayed for a long time even if the phone is turned off or the case is removed. Cut : The projected image can only display black, white and red, but with some clever dithering techniques and different levels of color intensity, it can a full color effect. Endless Possibilities: If you have inspiration or are proficient in using AI drawing applications, it will your desire to show off your work. Wide range of applications: This product has a wide range of applications. It only needs to be operated on the application. There is no need to send information to others and no need to worry about privacy leaks. Easy to use: The app is easy to use, yet powerful, allowing you to make magic . It's like constantly replacing a phone case. PERFECT FIT: This case is drop-tested and has precise openings for easy access to all buttons, speaker and charger slots. Offers a delicate touch and non-slip handle. Fitment:A:for 15 Colour:Black Material:TPU Package Contents: 1 * phone case Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.