Small size is suitable for DIY 40P MICROBIT horizontal socket socket USB: 5V1A power supply meets the requirements of driving force. Support 3V-5V sensor module Comes with buzzer (switch) Power supply mode: USB 5V 1A On-board functions: 5V1A self-recovery fuse Buzzer (PO interface) 3.5mm audio port (P0 interface) Toggle switch (used to switch buzzer music output and audio port sound output. USB power switch gold , which are seamlessly butted with the 0, 1, 2, 3V and GND pins of microbit to protect the gold of microbit. 5V and 3.3V power interfaces, and support 3-5V sensor modules (onboard 5V and 3.3V power indicators). Include pins 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 19, 20. Simulated feet: 0, 1, 2 Type: Microbit expansion board Usage: :bit horizontal adapter for elementary and secondary schools Product description: It supports Scratch Python programming and 3-5V sensor module. Application field: Internet of Things IoT color:Black Material:PCB size:57 x 37mm Package Contents: 1 x Expansion Board 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.