This is a custom Game Boy DMG-01 with an IPS LCD screen and a glass screen protector. Functionality: * Operation has been confirmed. * All buttons, speaker, and game cartridge reading have been tested and are working correctly. Brightness Adjustment: * The dial on the left side of the unit can be used to adjust the brightness in 20 steps. Color Mode Adjustment: * Pressing the dial on the left side of the unit briefly will change the color mode to one of 8 colors. OSD Menu: * Pressing and holding the dial on the left side of the unit will open the OSD menu. OSD Menu Contents: * Brightness: Brightness adjustment (1-20) * Color Mode: Color adjustment (8 colors) * Pixel Effects: Dot display (Standard, Dot) * Desaturation: Saturation adjustment (0-20) * FRM: Frame correction (Function to reduce afterimages in some games) * Factory Reset: Reset to factory settings The shell, buttons, and LCD are new, but the board and speaker are original, so there may be some signs of use or noise. Please be aware of this if you are concerned about these aspects. Batteries and game cartridges are not included. Internal cleaning has been performed.