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. Please remove it by sliding it off. The whole thing reacts to UV light and glows, and also glows in the dark due to phosphorescence (the cloudy white parts in the image). By using fluorescent materials for the text, volume guard, and display guard, they react to UV light and become colored. When the UV light is turned off, only the phosphorescent parts will glow. The second image shows the item under UV light. The third image shows the item at its brightest, clearly visible in the dark. Choose from green and orange. Please feel free to comment about the color scheme. Double-sided tape is attached to the back for adhesion to the main unit. * The item in the photo will be created and shipped after purchase. * No discounts or exclusive offers will be made.