A piezoelectric transducer converts mechanical force into electrical output. This is made up of Quartz crystal which contains SiO2. Piezoelectric crystals are electrically neutral. The atoms inside the crystals in an unsymmetrical manner but their electric charges balanced When the force is applied to stretch or bend it, an electric voltage is generated. If there is no stress, no charges are induced. When there is stress, positive charges are induced on one side and negative charges induced on the opposite side. Compression occurs in the crystal as the force is applied. Applications: Used in Medical Diagnostics Electric lighter Microphones. Features Clear sound Ultra-thin and lightweight No contacts: therefore, no noise and highly reliable Low power consumption for voltage type Excellent accessory for acoustic instrument pickups, stompboxes, contact mics, etc. Piezoelectric buzzer film. Can be fitted to used acoustic guitars, CBGs, drums, etc. 35mm brass outer diameter plate and ceramic inner diameter plate. All the discs are made from selected copper, ensuring excellent conductivity and long-lasting use. SKU: RM016791 Category: Buzzers and Speakers Warehouse Code: R00009-S06-P04-Z01