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CH905ST
Ultra-sensitive earphones with 20K ohm impedance and 57 dB sensitivity.
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From $2.75 /unit
MouseTrap car or Rubber Band Car Kit.
Dual-powered STEM kit with mousetrap and rubber band propulsion.
Piezoelectric Earphones/Crystal Earphones
Ultra-sensitive earphones with 20K ohm impedance and 57 dB sensitivity.
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