buzzer sound: 1)rated voltage: 1.5v,3v,6v,9v,12v,24v. 2)size:17*35.5*mm 3)*sound output @ 30cm: 70 dB 4)weight:8g buzzer sound:Model No.:KT-30MB04015L,KT-30MB04030L,KT-30MB04060L.KT-30MB04090L,KT-30MB04120L,KT-30MB04240L.Please check below infos as model.1)Operating temperature: -20-+65 degrees.2)Fundamental Frequency: 400+_ 50 DC1.5-24v buzzer sound