Buzzer Dimensions ø x H: 16 x 22 mm Frequency: 2000 Hz Operating temperature: -10...55 °C Assembly: Flush Mounted Colour: Black Current consumption: ≤20 mA Protection rating: IP40 Service life: >1000 h Termination: Solder Tone type: Continuous / Pulse Tone / Buzzer Contact spacing: 8.4 mm Mounting aperture ø: 16 mm Operating voltage: 12...24 V