Self-driven Piezo Transducer KPT3-4100 series Piezo Transducer DIMENSIONS 17 Bottom View CIRCUIT OF TEST Side View Model No Rated Voltage Operating Voltage Max. Rated Current Min. Sound Pressure Level Resonant Frequency Tone Nature Operating Temperature Weight Value applying at rated voltage KPT3-4100 9VDC 6/12VDC 10mA at 9VDC 95dB at 9VDC/30cm 3.4¡À0.5KHz Continuous -20~+60¡æ 11g color straw yellow PA66 Housing Material Pin Terminal all dimensions are in mm KPT3-2510 series Piezo .