Micro expansion board: bit GPIO expansion Python IO: Bit 5V with passive buzzer on boardSupport air drop and wholesale.100% original and high-quality, with free after-sales warranty.The IO: bit expansion board is a powerful micro: bit expansion board that can connect 19 PIN pins of the Microbit board.Each PIN pin has corresponding VCC and GND. You can freely switch VCC to 3.3V or jumper cap. 5V; 3 independent 3V3 and 5V pins for more flexible and diverse wiring;Provide I2C SDA and SCL pins as well as corresponding 5V and GND pins for the moduleMore possibilities for connecting I2C communication on liquid crystal displays such as LCD1602;Equipped with a passive car mounted buzzer, connected through a jumper cap;The power supply method includes DC head and USB socket power supply.PCB board thickness: 1.6mmSmall circular hole diameter: 3.0mmDiameter of large circular hole: 4.6mm (compatible with the hole)Product size: 57mm/39mm/15mmUSB input voltage: 5VInput voltage of DC head: 6-12VColor: BlackMaterial: PlasticSize: 57 x 39 x 15mmPackaging content:1 expansion boardOnly the above packaging content is included, and other products are not included.Attention: Light shooting and different displays may cause the color of the items in the picture to be slightly different from the actual object. The allowable measurement error is+/-1-3cm.