Features: Complete craft set : Includes all necessary components for assembly, providing hands on experience with electronic parts and soldering, perfect for beginners and hobbyists. Educational Value : Enhances basic soldering skills and electronic component assembly through practical project building, ideal for learning fundamental electronics. Music Spectrum Visualization : Features a sensitive microphone to analyze sound frequencies and display dynamic LED light patterns synchronized with music. Adjustable Sensitivity & Speed : Customize the display with adjustable refreshes rate, sound sensitivity, and sampling frequency for individualized visual effects. Compact & Portable Design : Measures 113x72x12mm with a sleek protective case, making it easy to integrate into any setup while ensuring durability. Specifications: Component:Plastic Shell Size: Approx.113x72x12mm/4.44x2.83x0.47inches Package Includes: 1Set craft Music Spectrum Led Light Welding Practice set note: Please allow 1-2cm error due to manual measurement. Please make sure you do not mind before you bid. Due to the differences between different monitors, the picture may not reflect the actual color. Thanks!