Stable structure: Made of ABS material, flame retardant and durable. An integrated electronic vocalizer consisting of multi-harmonic oscillator, piezoelectric buzzer chip, impedance matching unit, resonator and housing.
Package Content : 6 x 85DB piezoelectric Active Electronic Buzzer Alarm.
Color: black Alarm diameter: approx. 22mm Alarm height: approx. 10mm 2 Mounting holes distance: approx. 30mm 2 Wires length: approx. 90mm Buzzer type: piezoelectric Sound pressure level: 95 dB Rate voltage: 12V DC Operating voltage: 3-24V Max. current rating: 10mA Frequency: 3900±500Hz Drive method: drive circuit built in mounting holes Sound: "Di" Continuous Fine workmanship and stable performance. Easy to use. Durable in use.
Note: Please allow 1-5mm errors due to manual measurement. Item color displayed in photos may be showing slightly different on your computer monitor since monitors are not calibrated same.