R-TECH 524438 is an uncased miniature piezo transducer offering an ultra low profile. * Ideal for use with speech and music modules, as fitted to greetings cards and toys * Frequency Response: 6.8 ± 0.7 kHz * Resistance: ≤300Ω * Capacitance: 15000pF ± 30% * Outer plate material: Brass * Element material: Ceramic * Connection: 95mm flying leads * Diameter: 20mm