Made of , durable, firm, and stable to use. This allows you to connect various items as input. It is an invention kit that makes your computer recognize almost anything as a keyboard. The kit uses high resistance switching to detect connections, even through non-conductive materials. The ATMega32u4 connects to your computer using the human interface device (HID) protocol, enabling it to function as a keyboard or mouse. No programming required, no complicated wiring, and no software installation neededsimply connect via USB for immediate use. Item Type: Main Control Board Kit Communication Interface: USB Color: As shown Material: PC + Metal Package Contents: 1 x Controller Board 10 x Crocodile Clips 1 x USB Cable 10 x Jumper Cables Note: The package includes only the items listed above. Other products are not included. Lighting and display settings may cause slight color variations between the image and the actual item. Measurement error is +/- 1-3 cm.