Description: brand new and high quality. Feature: 3.5mm audio interface USB 5V 1A power supply, meet high drive needs. 3.3V and 5V power interface, support for 3-5V sensor module. IO: bit is a functionable expansion mini board for Micro: bit, which contains a miniature buzzer. Plug and for play, for Micro:bit. With for lego mounting holes, for KittenBot. Adapter Board only, other accessories demo in the picture is not included! Specifications: Item Type: Adapter Board Power Supply: USB 5V 1A PO Interface: 3.5mm audio intyerface Switch: Usb power switch Material: PCB Board Size: 57x37x12mm/2.2x1.4x0.4in Color: Black Quantity: 1 Pc Note: No retail package. Transition: 1cm=10mm=0.39inch Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package Includes: 1 x Adapter Board