Made of high- material, durable, and stable to use.This allows you to connect all types of funny things as input.It is an invention kit that makes your computer that anything is a keyboard.The kit uses high resistance switching to detect when you have made a connection even through materials that are not .The ATMega32u4 connects to your computer using the human interface device () protocol which means that it can as a keyboard or a mouse.No need to , no need to connect lines, no need to install software, just need to connect USB to use, very simple Specifications:Item Type: Main Control Board KitCommunication interface: USBColour:As shownMaterial:PC+MetalPackage Contents:1 * Controller Board10 * Clips1 * USB Cable10 * Only the above package content, other are not included.Note: Light 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.