This is a 3D-printed protective cover for the QUAD CORTEX. If you want a slightly different look from other products, this is for you! It prevents scratches and sweat from getting on the main unit, and a guard has been added around the volume knob. The volume knob guard can also be removed, so please choose as you like. The screen part has a transparent cover that can be attached with magnets, and can be removed smoothly during operation. When removing it, slide it off. The whole thing reacts to UV light and glows, and it also glows in the dark due to phosphorescence. The second photo shows it exposed to UV light. The third photo shows it at its maximum glow, clearly visible in the dark. The fourth photo shows it after being exposed to household lighting about 2 meters above, with the lights off. In reality, it appears to glow a little less. The fifth photo is a color inversion. The sixth photo is a color inversion at maximum glow. If you have any requests for color schemes, please comment. Double-sided tape is attached to the back for adhesion to the main unit. * We will create and ship the item after purchase, based on the photos. * No discounts or exclusive offers.