Features 【Piezoelectric Buzzer Composition】Piezoelectric buzzer is mainly made up by multivibrator, piezoelectric buzzer chip, impedance matching unit, resonator and shell. 【Multivibrator Composition】Multivibrator is composed of transistors or integrated circuits. When switched on, multivibrator vibrates and outputs audio signal. 【Function】Impedance matcher drives piezoelectric buzzer sound. Connected to rated power and the buzzer will sound continuously. 【Easy To Use】Can be controlled conveniently. 【Guarantee】If you have any questions about the product, please email us, we will reply you and solve your questions within 24 hours. 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. Specifications: Model: 2312 Color: Black Diameter: 2m Height: 12mm Cable Length: 100mm Sound Pressure Level: 85 to 95 decibels Rated Voltage: 12VDC Working Voltage Range: 3V-24V Max Current: 10mA Weight: 3g(approx.) Package includes: 1 x Buzzer Note: 1. Please allow 1-m 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. Package List