HYT-3015B DC 3-24V 2 Wire Intermittent Sound Piezoelectric Buzzer 2pcs Product Name : Piezoelectric Buzzer;Model No. : HYT-3015B;Type : Intermittent Sound;Rated Voltage(Square Wave) : 12V Working Voltage : DC 3-24V;Rated Current : 20mA;Min Sound Output at 10cm : 80dB Resonant Frequency : 3100+/-500 Hz;Operating Temperature : -20-+80 Celsius;Overall Size : 48 x 30 x 15mm / 1.9" x 1.2" x 0.6" (L*W*T) Oval MountHole Size : 3.5 x 4mm / 0.14" x 0.16"(W*L);Wire Length : 10cm / 4";External Material : Plastic Color : Beige;Weight : 15g;Package Content : 2 x Piezoelectric Buzzer