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CH905ST
Ultra-sensitive earphones with 20K ohm impedance and 57 dB sensitivity.
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From $2.75 /unit
Piezoelectric Earphones/Crystal Earphones
Ultra-sensitive earphones with 20K ohm impedance and 57 dB sensitivity.
Motor Generator Demonstration Kit For Students Science Projects
Electricity Conversion Kit for Science Education and Projects.
Wooden Generator Science Kit Assembled (Put Together)
DIY renewable energy source - wooden generator kit.
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