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 can prevent 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, please 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 looks a little less bright. The fifth photo is a reversed image. The sixth photo is a reversed image at its maximum glow. Please comment if you have any requests for color schemes, etc. 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.