High Precision & Wide Voltage Range 23mm piezoelectric ceramic buzzer; 1.5V to 30V operating voltage; 6.0 ± 0.7 kHz resonant frequency; 15000 ± 30% 6pF capacitance; Durable Copper Plate Design Copper plate wired buzzer; -20°C to 70°C operating temperature; corrosion-resistant construction; long-lasting performance in DIY projects; Easy Integration & Compatibility Pre-wired for quick installation; compatible with Arduino and Raspberry Pi; ideal for touch sensors and sound detection applications; Low Power & High Sensitivity Low power consumption with 1.8 µA sleep mode; high sensitivity for acoustic and vibration detection; no calibration required; Versatile DIY Application Suitable for acoustic instrument pickups; contact microphones; foot stompers; and homemade speaker systems; easy to use for beginners and makers