The for Zero to 4B interface adapter with USB hub and RJ45 10/100M port.With the unique design , you can make your zero with same USB/HD/RJ45 port .The height of 20x2 GPIO Pins will not change . You can use GPIO expansion board perfectlyThe GPIO height position continues the GPIO height of the 4B and ZERO, allowing customers who need to plug in various GPIO expansion boards to do so perfectly and at the same height.Onboard 3 way USB expansion port, compatible with USB 2.0/1.1 transmission.Introduction to interface3x USB ports, compatible with USB2.0/1.11x RJ45 10/100M port, based on the RTL8152B Ethernet chip-type -Compatible to 4B -Compatible portWork at zero also can work at a computer/Android phone with -usb 4B or other mini computer with a -usb cableAccessory Type: Extension BoardCompatible With: for Zero/Zero W/Zero 2W /Purpose: Expansion board modulecolor:GreenMaterial:PCBPackage Contents:1 x Zero To 4B Extension Board1 x Data CableOnly 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.