uxcell 2Pcs DC 3-24V SFM-27 Continous Beep Piezo Active Electronic Buzzer Product 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 Color : White;Weight : 16g Package Content : 2 x Active Electronic Alarm Buzzer