High Sensitivity & Wide Operating Range 4.1 kHz Resonant Frequency; 1.5 -30V Operating Voltage; -30°C to 70°C Temperature Range; Ideal for acoustic instrument pickups and contact microphones; Durable Construction for Reliable Performance Copper-Plated Aluminum Shell; 28000pF Capacitance; Low Power Consumption; Suitable for DIY electronics and vibration detection projects; Easy Integration with Popular Platforms Pre-Wired for Quick Setup; Compatible with Arduino and Raspberry Pi; Simple Installation for homemade instruments and sound sensors; Precise Signal Capture for Acoustic Applications 4.1 kHz Resonant Frequency; 28000pF Capacitance; High Sensitivity for Sound and Vibration Detection; Perfect for drum triggers and touch sensors; Robust Design for Long-Term Use Copper-Plated Aluminum Casing; Resistant to Environmental Stress; Stable Performance in Various Conditions; Not for high-voltage (>50V) systems