Electronic Buzzer - TOOGOO(R) 5 Pcs DC 3-24V 85dB Sound Electronic Buzzer Alarm Black 23 x 12mm Product Name : Electronic Buzzer Sound-making Type : Continuous Sound Working Voltage : DC 3-24V; Rated Current : 12mA Frequency : 4000+/-500Hz; Sound : 85dB Color : Black; Weight : 20g