Feature 1 APPLICABLE MODELS: Replacement optical drive simulation board for GDEMU, with for Gdemu's expansion storage card cartridge, replaces the CD ROM drive enclosure. 2 HEAT DISSIPATION: Optical drive simulation board reads games quickly and smoothly. Full metal card holder with two heat sinks to effectively improve ventilation and heat dissipation. 3 COMPATIBLE WITH CDI MIRRORING: Gaming optical drive simulation board perfectly runs the original GDI image and is compatible with CDI image. Replacement CD ROM drive chassis, stable and wear resistant. 4 STABLE PERFORMANCE: Optical drive simulation board is suitable for DreamCast Gaming VA1 version mainframe (expansion adapter for GDEMU). High and stable performance ensures you enjoy your games. 5 EASY INSTALLATION: Easy installation, you can remove the original optical drive holder and replace it with for GDEMU, no soldering and no modification to the machine board. No harm to the host.Item Type: Optical Drive Simulation BoardMaterial: ABS, PCBColor: Translucent PurpleVersion For GDEMU: V5.15bHeight Of Analog Board Holder Interface: Approx. 8mm / 0.3inApplicable Model: For DreamCast VA1 Game Console (Expansion Adapter For GDEMU) For GDEMU V5.5, For GDEMU V5.15 And For GDEMU5.15BUpgrade: Changed The Storage Card Holder, Full Metal Card Clip, Read The Storage Card More Smoothly And StableFeatures:1. Robust And Durable2. Effective Improvement Of Ventilation And Heat Dissipation.3. With Extended For GDEMU Storage Card Cassette4. Alternative CD ROM Drive Chassis5. Storage Card Memory Card Slot6. Quick Switch Game Button Package List1 x Optical Drive Board3 x Fixer2 x Heat Sink1 x Drive Tray Insert1 x Button1 x for GDEMU Board Mounting Bracket1 x Storage Card Extension Cable1 x Screw Package1 x Instruction ManualNote1. Please allow some error due to manual measurement.2. Can install dc host for VA1 motherboard, otherwise it will burn for gdemu. remember not to plug and unplug for GDEMU with power on, must be careful.