This adapter board has 4USB ports + RJ45 network port. It is not a 3USB port (1 USB port is missing) or a version with a missing RJ45 port. The function is more perfect, and the switch + switching IC is more beautiful than using the jumper cap to switch. This adapter board can perfectly convert the zero to the 3B shape structure, At the same time, if you are using Zero 2W, because the zero 2W main control CPU is the same model as the 3B, it can be perfectly compatible. For Banana Pi -M2 Zero to 3B expansion board, zero USB HUB and Ethernet expansion board. Set: C of this product Using a unique adapter design, direct insertion, a strong sense of . At the same time, the zero port is converted into a 3B universal female port, which is convenient to use. At the same time, the GPIO height position perfectly inherits the GPIO height of 3B and zero, so that customers who need to insert GPIO expansion boards can insert them perfectly, and the height remains unchanged. Interface Introduction Onboard 4-way USB expansion port, compatible with USB 2.0/1.1 transmission Onboard RTL8152B Ethernet chip, support 1 RJ45 network port, 10/100M auto-adaptive Can be installed directly to Zero/Zero W/Zero WH and Banana Pi M2 Zero, through jumper test, can be connected to other versions of , Banana Pi or general computer or Android phone through usb cable Material: PCB colour: blue Package Contents: 1 x ZERO to PI3 Adapter 1 x -M2 Zero Board 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.