2Pcs DC 3-24V SFM-27 Continous Beep Piezo Active Electronic Buzzer
£2.55Product Name : Active Electronic Alarm Buzzer;Model : SFM-27
Working Voltage : DC 3-24V;Body Size : 30 x 15mm / 1.2″ x 0.6″ (D*T)
Cable Length : 10cm / 3.9″;External Material : Plastic