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 V1: Input voltage: DC 5-9V Output voltage: DC3.3V Dimensions: 66 x 57 x 12mm color:Red :PCB Package Contents: 1 x Sensor expansion board V1 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.