1. design mode: the principle prototype focuses on the function verification, key components and functions of the product, and shows the principle and functions of the product through simple assembly, usually by means of rapid prototyping technology, circuit board and 3D printing.
2. Exhibition purpose: The principle prototype is to verify the function and principle of the product, test whether its performance meets the standard and detect whether it has defects.
3. Manufacturing materials: Prototypes are usually made of rapid prototyping technology, circuit boards, 3D printing and other materials.
4. Manufacturing method: the principle prototype shows the principle and function of the product through simple assembly.