Features: Build your own seven color LED Christmas tree with this electronics , featuring multiple programmable lighting modes for customizable festive displays and interactive fun. The includes diverse components like colorful LEDs, main control board, resistors, and wires, all with detailed instructions and circuit diagrams for straightforward assembly and circuit learning. for beginners, students, and electronics hobbyists seeking engaging way to grasp basic circuit knowledge and develop hands on skills through practical experimentation. for educational STEM projects, holiday decorations, or as creative activity in classrooms, homes, or workshops to inspire innovation and festive cheer. from recyclable PCBs materials, this sustainable promotes environmental safety while fostering creativity and foundational electronics understanding. Specifications: Materials: PCBs Size: 60x60x136mm Weight: 70g Output voltages: 5V Working voltages: DC4.5-5V Styles: Not Battery Box, With Battery Box(optional) Power supply : 3 AA batteries or USB chargers (delivered without batteries) Package Includes: 1Set Christmas Tree Electronic Learning note: Please allow 0-1cm error due to manual measurement. make sure you not mind before bid. Due to the differences between different monitors, the Pictures may not reflect the actual of the item.