30pcs 20mm Copper Plate Aluminum Casing Piezoelectric Buzzer Disc Sound Cavity

High Sensitivity & Low Power Consumption 20mm piezoelectric disc with copper-plated aluminum casing delivers high sensitivity and low power consumption; operates at 1.5V to 30V; 6.8 kHz resonant frequency; 15000pF capacitance; ideal for acoustic instrument pickups and contact microphones; Wide Operating Temperature Range Designed for reliable performance in diverse environments; functions between -20°C and 70°C; durable construction ensures stable operation in various DIY projects and sound detection applications; Easy Integration & Compatibility Pre-wired for quick installation; compatible with Arduino and Raspberry Pi; suitable for touch sensors, drum triggers, and homemade instruments; no calibration required for consistent performance; Robust Material & Long-Lasting Durability Constructed from copper-plated aluminum housing and ceramic components; resistant to wear and tear; provides long-term reliability for repeated use in creative electronics and sound modification projects; Versatile Application for Makers & Beginners Ideal for transforming acoustic instruments into electric sound sources; works well as a buzzer, vibration sensor, or sound cavity component; supports a wide range of DIY and educational projects without complex setup