Description:Buzzer is an electronic sounder with integration structure. Using DC power, it is widely used on computers, printers, photocopiers, alarm, electronic toys, automotive electronic equipment, telephone, timer and other electronic products.Features:1, Piezoelectric buzzer is mainly made up by multivibrator, piezoelectric buzzer chip, impedance matching unit, resonator and shell.2, Multivibrator is composed of transistors or integrated circuits. When switched on, multivibrator vibrates and outputs audio signal. 3, Impedance matcher drives piezoelectric buzzer sound.4, Connected to rated power and the buzzer will sound continuously.5, Can be controlled conveniently. Specifications:Model: 2312Color: BlackDiameter: 23mm Height: 12mm Cable Length: 100mm Sound Pressure Level: 85 to 95 decibelsRated Voltage: 12VDC Working Voltage Range: 3V-24V Max Current: 10mAWeight: 3g(approx.)Package includes:1 x BuzzerNote:1. Please allow 1-3mm error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.