4 Pcs Piezo Electronic Buzzer 3-24V Tone Active Alarm Electronic Buzzer Alarm Sounder with Wire Leads 100mm for Physics Circuits Continuous Sound

【RATIONAL DESIGN】- Buzzer is an electronic sounder with integration structure. Using DC power, connected to rated power and the buzzer will sound continuously. 【CORE COMPOSITION】- Piezoelectric buzzer is mainly made up by multivibrator, piezoelectric buzzer chip, impedance matching unit, resonator and shell. 【PRODUCT PRINCIPLE】- Multivibrator is composed of transistors or integrated circuits. When switched on, multivibrator vibrates and outputs audio signal. 【EASY TO CONTROLL 】- Impedance matcher drives piezoelectric buzzer sound. Can be controlled conveniently. 【 APPLY TO】- The active buzzer is widely used on computers, printers, photocopiers, alarm, electronic toys, automotive electronic equipment, telephone, timer and other electronic products., Manufacturer: Dolaso