uxcell DC 3.3-5V Passive Low Level Trigger Buzzer Alarm Sound Module Product Name : Passive Buzzer Alarm Module;Voltage : DC 3.3-5V PCB Size : 3.1 x 1.3cm/1.2" x 0.51"(L*W);Materials : PCB Main Color : Blue Net Weight : 8g Package Content : 1 x Passive Buzzer Alarm Module