1. for 5 multi-function machine, specially designed for 5. Modular design, simple assembly for quick use, large space, rich interfaces and strong scalability. 2. Large space and strong scalability. There is enough space in the chassis to connect expansion modules, such as PoE modules, etc., and there is still room for cable routing, which is for obsessive-compulsive disorder. 3. Lead out the Pi5 peripheral interface, support both front and rear power supply methods, each version comes with a Micro- to adapter board, and support the lead out Type-C interface, and wiring terminals, so that the interface is not hidden deep in the chassis It is convenient for other peripherals to access the interface, and supports two power supply methods: one front and one back. 4. Dual 4K HD output, each version supports dual interfaces and dual 4K video output 5. Three-dimensional air duct, efficient heat dissipation, reserved ventilation grid, and installing fans for better heat dissipation effect Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Will Not Affect The Use Colour:As Shown Material:PCB+Aluminum alloy Type: C:Pi5 Module BOX-B,4K high-definition output (Type B PCle expansion 4-way USB3.2) Package Contents: 1x adapter board 1x expansion adapter board 1x button 1x terminal block 1x cable 1set x screws 1set x connecting wires 1set x housing and white aluminum alloy base Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.