Made of high-quality materials, firm and stable to use. This allows you to connect various objects as input. It is an invention kit that enables your computer to recognize almost any object as a keyboard. The kit uses high-resistance switching to detect connections—even through non-conductive materials. The ATMega32u4 microcontroller connects to your computer via the Human Interface Device (HID) protocol, enabling it to function as a keyboard or mouse. No programming required. No complex wiring. No software installation needed—simply connect via USB to use. Specifications: Item Type: Main Control Board Kit Communication Interface: USB Color: As shown Material: PC + Metal Package Contents: 1 × Controller Board 10 × Crocodile Clips 1 × USB Cable 10 × Jumper Cables Note: Lighting conditions and display settings may cause slight color variation between the image and the actual product. Measurement tolerance: ±1–3 cm.