1. Zero-based friendly welding practice, a skill-enhancing tool:The kit contains 20+ electronic parts such as precision PCB motherboard, resistors, capacitors, buzzers, etc., with clear classification and clear markings,Adopting safe low-voltage circuit design (working voltage: 3V), the welding process is risk-free, and novices can easily get started. 2. "To " classic melody, customized birthday gift:The core chip is pre-burned with Beethoven's classic song "To ", one of most popular piano pieces in world, delivering elegant blessings 3. Modular maker design, inspiring unlimited expansion:Open GPIO interface, can be connected to external sensors, motors or Bluetooth modules, upgrade intelligent light control, remote control playback and other gameplay, 4. Compatible with for development platform, providing extended code library, suitable for students to use as electronic design competitions or course homework A classic song conveys your feelings, and you can create eternal memories with your hands:Whether it is to celebrate a friend's birthday, express your feelings for your lover, or complete maker assignments and improve welding skills - this "To " music box electronic kit perfectly combines romance of melody and sense of achievement of creation, allowing feelings to flow forever in notes and skillful hands! Color: Blue Material: PCB Package Contents: 1set x DIY music box Only above package content, other products are not included. Note: Light reflection and different displays may cause color of item in picture a little different from real thing. The measurement allowed error is +/- 1-3cm.