1、COMPATIBLE MODEL: Optical drive simulation board is only available for SEGA DreamCast DC VA1 console motherboard, otherwise it will damage the for GDEMU, the height of the white interface is about 8mm/0.31in. 2、MULTI FUNCTION: This console optical drive simulation board has multiple new functions, including system code updates, for SoA and for RE: CV for auto timing files. New INI option to manually limit for GDEMU speed. 3、REPLACEMENT: Available to replace faulty optical drive simulation board parts. Maximum storage card accepted is 512GB. With fast game reading speed to ensure you enjoy your games. 4、EASY TO INSTALL: New v5.20 (v5.20.3) for GDEMU, easy to install, no need to solder and modify the machine board. Use the original interface, no damage to your gaming device. 5、QUIET: Game console memory card extension board, remove the jagged sound of optical drive, read for DC game machine board faster, bring you a better using experience. Item Type: Optical Drive Simulation Board Material: PCB Size: Approx. 7.9 x 7cm / 3.1 x 2.8in Scope of Application: For DreamCast VA1 Host Simulation Board Version: V5.20 (5.20.3) New Features: 1. System code update 2. Automatic timing files for SoA and for RE:CV Details: 1. Fixed for Arcadia opening lag issue. 2. Fixed for Veronica Tiger Head Jewel bug causing inability to get slotted items. 3. Some images that could not be recognized by older firmware versions can now be recognized. 4. Some GDI images that have been previously reorganized by tool streamlining are recognized on older firmware versions, but may not be recognized and unrecognized on newer firmware versions. 1 x Optical Drive Simulation Board 3 x Fixer