The for USB expansion board is specially designed for Raspberry Zero/Zero W series development boards to solve the problem of insufficient USB ports. The USB interface instantly changes from -3 to four, and it is also suitable for 3B/3B+, etc. Product parameters 1. Onboard 4 USB expansion ports, compatible with USB2.0/1.1 transmission 2. Onboard CP2102 USB to UART chip, convenient for debugging 3. Compatible with for Raspberry ZerolZero w/3B/3B+ and other development boards Onboard USB output indicator and UART communication status indicator Working voltage: 5V Board size 65MM x 30.2MM Color: blue Material: Metal+Plastic Package Contents: 1 x HUB motherboard 1 x USB adapter board 1 x Cable 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.