Stunning Gaming Design GRone features superb expandability inside and a large full-view window outside that reveals your building system and allows you to enjoy gaming presentations. Top 3.5”/2.5" SATA HDD EZ-Swap Module Turbo / Silence Dual Mode Switch LED Power Switch Reset / HDD LED Tool-Free 5.25” ODD Bays The tool-free mechanism minimizes hassles while installing optical drives by simply sliding the ODD into the place and pushing the fasteners to secure the optical drive. Tool-Free 3.5” Drive Bay Design User friendly 3.5” drive installation design makes building-a-system as simple as possible. Secure the 3.5” HDD on the Tool-Free HDD tray and simply slide the tray into place and close the front cover to secure the 3.5” drives. All the HDD trays are compatible with the newest 2.5” SSD/HDD.