Piezoelectric transducer - buzzer in the housing.
TECHNICAL DATA:- Rated voltage:12-24 VDC
- Operating voltage:3~16 VDC
- Resonant frequency:3.2kHz ± 0.5kHz
- Rated current:35mA at 12 VDC
- Sound level:about 100dB
- Signal type:continuous sound
- Operating temperature range:-20°C to +60°C
- Housing diameter:45mm
- Weight:21g