Made of high-quality material, , firm 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 think that almost anything is a keyboard. The kit uses high resistance switching to detect when you have made a connection even through materials that are not conductive. The ATMega32u4 connects to your computer using the human interface device (HID) protocol which means that it can act as a keyboard or a mouse. No need to program, no need to connect tedious lines, no need to install software, just need to connect USB to use, very simple! Specifications: Item Type: Main Control Board Kit Communication interface: USB Colour:As shown Material:PC+Metal Package Contents: 5 x Controller Board 50 x Crocodile Clips 5 x USB Cable 50 x Jumper Cables 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.