Features: Note: All version do not include motherboards. Modular design, simple assembly can be quickly used Large space with rich interfaces and strong expandability Enough space in computer case. Access to a variety of expansion module, such as ethernet module, and there is still room for wiring and cabling. Stereoscopic air ducts for efficient heat dissipation Reserve ventilation, add a fan for better heat dissipation. Specifications: Component： Aluminum Case Size:about 16.3x9.1x4.3cm/6.42x3.58x1.69in Type： Module BOX-A / Module BOX-B/ Module BOX-C Optional For RPI 5 Board(Not Include Mainboard) Package Includes: 1PC Aluminum Case note: Due to the different monitors and light effect, the actual color the item might be slightly different from the color showed on the pictures. Thank you! Please allow 1-2cm measuring difference due to manual measurement.