This is a cover specifically designed for the Quad Cortex, made from 2mm thick acrylic. It securely protects the top surface of the unit, excluding the LCD and buttons, from scratches and falling objects. Double-sided tape that leaves minimal residue is included. 【Important Notice】 Since its release, this product has been a popular choice for many customers. We continue to ensure the highest quality and provide excellent support, so you can use it with confidence. Recently, we identified some instances of "unauthorized purchases solely for the purpose of lowering our rating" by certain competitors. However, these actions were recognized as malicious by the Mercari administration, and the corresponding ratings have already been removed. We will continue to provide honest and reliable service, so please feel free to purchase with peace of mind.