1. This expansion board is specially designed to facilitate the wiring of For :bit development boards and other sensors and modules. 2. A power module is integrated on the expansion board, which can directly supply power to the For :bit board, and can also increase the load capacity of the board. 3. At the same time, it also expands the IO port on the For :bit board in the form of a steering gear line sequence (G V S), and also has an I2C communication interface, a serial communication interface, and a SPI communication interface to facilitate various communications. 4. Onboard For :bit interface, no need to connect, just plug and play 5. Lead out the control pins of the module and the pins on the For :bit, which is convenient for expansion and use Expansion board V2: Two power input methods: black DC head input DC7-9V; -USB interface input DC5V Two voltage output modes: V1V2 jumper cap is connected to select voltage output, 3.3V and 5V can be Dimensions: 65 x 56 x 15mm color:Red :PCB Package Contents: 1 x Sensor expansion board V2 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.