The Shadow SH-712 is a fast and easy-to-install dual disc transducer designed for any instrument. The larger 20mm transducers sense more low frequencies than smaller 12mm transducers. Sensors mount to any instrument to sense vibrations and convert them to an electrical signalSensors adhere with included non-permanent "tak" adhesiveIncludes 1' cable with 1/4” Output Jack  " Leia mais