5Pcs Active Piezo ,Sounder Alarm ,DC3-24V ,Sfm-27 ,Continous Sound 100dB Piezo Security Alarm Tone Alarm for Motorcycle Car. The 3-24V DC Electronic is made of high quality , which is durable and can effectively extend the use time.This SFM-27 Active Piezo consists of five parts, which are a multivibrator, impedance matching unit, resonator, chip chip, and shell.Rated voltage: 12V voltage, when current: 12VDC, the sound pressure is 15mA Sound pressure frequency: 12VDC / 30cm is 100dB.After the Alarm receives the signal, it will continue to occur and continuously.Sounder Alarm is widely used in computers, motorcycle electronic equipment, , computers, etc. as sounding devices.3-24V DC Active Piezo Electronic . SFM-27 Sounder Alarm Continuous Beep. Alarm 100dB Piezo Sounder Project. Motorcycle Golf Cart Physics Circuits Security. Easy to install stable Accessories replacement.
