SMD piezo buzzer,Internally driven type Rated Voltage: 12VDC Operating Voltage: 3-16VDC Rated Current : 12mA Max. S.P.L.(@10cm): 90dB Min at Rated Voltage at 10cm Resonance Frequency : 4.0±0.5KHz Tone : Continuous Operating Temp: -30~+85°C Weight: 1.7g