Description The finished product of the diy soldering project material will be a beautiful and interesting Electronic Keyboard Oscillator. The process is fun and you will own a cool finished product. Excellent gift for electronics hobbyists. Features -Color:Green -Material:Plastic -Size:4.30X3.40X0.10cm/1.69X1.34X0.04in - Owning the strong wear and break resistance ability, very practical, with excellent texture. - Contains different parts, suitable for electronic piano, and electronic production to meet various creative needs. - The circuit is a typical multivibrator of 555, and determines the oscillation frequency. - Electronic DIY parts, with detailed welding electronic parts, easy for you to learn. - Wide application, not only suitable for beginners, but also a good choice for professionals to make. Owning the strong wear and break resistance ability, very practical, with excellent texture. Contains different parts, suitable for electronic piano, and electronic production to meet various creative needs. The circuit is a typical multivibrator of 555, and determines the oscillation frequency. Electronic DIY parts, with detailed welding electronic parts, easy for you to learn. Wide application, not only suitable for beginners, but also a good choice for professionals to make.