Features: 1. Versatility: Can be used to create a variety of electronics projects and experiments, suitable for a variety of applications, from basic e-learning to complex circuit design. 2. Learning tool: It is an ideal educational tool that can help students and beginners understand the working principles of electronic components and master basic circuit knowledge. 3. High quality: Made of high-quality materials, sturdy and durable, not easily damaged, and can withstand continuous use and experiments. 4. Simple installation: Simple design, easy to install and use, no professional electronic background knowledge is required, and it is easy to operate successfully. 5. Reasonable price: All required components are provided, which is very cost-effective and is a cost-effective way to improve electronic skills and knowledge. Specification: Material: PCB board + metal Size:As shown in the picture Color: As shown in the picture Package Includes:1set Notes: Please allow 1-2cm error due to manual measurement. Due to differences between monitors, images may not reflect the actual color of the item.