1. Based on the design for Zero, suitable for Zero series 2. Onboard 3-way USB expansion port, compatible with USB2.0/1.1 transmission 3. Rounded corner design, no cutting hands and no rigidity, buckle slot design, simple and convenient installation 4. Onboard RTL8152B Ethernet chip, support 1 RJ45 network port, 10/100M adaptive , can be connected to for Raspberry Pi4B/3B+/3A+/2B via USB cable 5. Using high-quality PCB material, the matte texture is delicate and does not leave fingerprints Matching two styles of top cover can be switched at any time, unrestrained and not troubled Product name: USB hub expansion board Product interface: 3*USB2.0 interface, 1*RJ45 network port Supply current: 2.5A Power supply voltage: 5V Expansion board size: 65x30mm Shell size: 72.8x37.5x28.4mm Colour:blue Material:PCB+Metal Package Contents: 1 x Expansion board 1 x Shell 1 x Screwdriver 1 x screw pack Only the above package content, other products are not included. Note: Light 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.