uxcell&reg; 15Pcs DC 5V 85dB Industrial Active Electronic Alarm Buzzer Product Name : Active Electronic Alarm Buzzer;Rated Voltage : DC 5V;Working Voltage : 6-24VDC Resonance Frequency : 2.8 +/- 0.5KHz;Sound Pressure : 85dB,/10cm/5VDC;Current Consumption(Max.) : &lt;=30mA Operating Temperature Range : -20-+70C;Body Size : 12 x 10mm / 0.47" x 0.4" (D*T);Pin Pitch : 7mm / 0.28" External Material : Plastic;Color : Black Weight : 25g;Package Content : 15 x Active Electronic Alarm Buzzer