Lightweight and portable, stable and , wear resistant and can provides long service time. The main function expansion board of BBC :bit is to connect 20 IO ports of :bit. The expansion board is designed with a vertical socket, which makes the expansion board and :bit keep 90and will appear three-dimensional sense after insertion. The bottom of the expansion board is equipped with 20 2.54-mm pins, which can be inserted into the breadboard or connected to other lines directly. lObit is an IO port extension board that supports :bit. It can extract all IO resources on the :bit. At the same time, there are two different power supply ports of 3.3 and 5V on the lO bit. Small and unique size, suitable for small projects of :bit : PCB colour: black Package Contents: 1 x BBC :bit GPIO Expansion Board kit 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 a little different from the real thing. The measurement allowed error is +/- 1-3cm.