durable, 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: 1 * Controller Board 10 * Crocodile Clips 1 * USB Cable 10 * Jumper Cables Only the above package content, other products are not included. Note: Light shooting 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. Note: 1. Please allow 1-3 mm error due to manual measurement and 1-3g weight error make sure you don't mind before ordering. 2. Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please make sure you don't mind before ordering, thank you! About Shipping: 1.please pay attention to your delivery address such as: name, street, house number, doorbell/email without name, etc. is correct, or the order will not be delivered correctly. 2.All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances. 3.During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours Hope you have a pleasant shopping experience!