High Sensitivity & Low Power Consumption 20mm piezoelectric buzzer; 1.5 -30V operating voltage; 1.8 µA sleep mode current; ideal for acoustic instrument pickups and contact microphones; Precise Resonant Frequency & Wide Operating Range 6.8 kHz resonant frequency; ± 0.6 kHz tolerance; -20°C to 70°C operating range; suitable for drum triggers and guitar sound sensors; Durable Construction for Long-Lasting Performance Copper plate with aluminum casing; 15000±30% 6pF capacitance; resistant to mechanical stress; perfect for DIY electronics and homemade instruments; Easy Integration with Popular Development Platforms Pre-wired for quick installation; compatible with Arduino and Raspberry Pi; simple setup for touch sensors and vibration detection; Reliable Design for Versatile Applications Low noise operation; stable performance in varying environments; not for high-voltage (>50V) systems; great for acoustic projects and sound triggers