Specification Brand : ZJ-Light BulletPoint1 : Widely use in computers, printers, copiers, alarms, electronic toys, automotive electronic equipment, telephones, timers and other electronic products for sound devices. BulletPoint2 : It made of oscillator, the electromagnetic coils, magnets, diaphragm and housing and other components. BulletPoint3 : Entangled in the diaphragm and the magnet solenoid BulletPoint4 : Frequency: 2300Hz +/-500hz BulletPoint5 : Voltage: 5V ExternallyAssignedProductIdentifier : 4602982417683 ExternallyAssignedProductIdentifier1 : 0606825164059 ExternallyAssignedProductIdentifier2 : 606825164059 ItemName : 20PCS 5V Electromagnetic Type Active Long Continuous Sound Alarm Piezo Buzzer ItemPackageDimensions_Height : 10.2 centimeters ItemPackageDimensions_Length : 3.8 centimeters ItemPackageDimensions_Width : 6.4 centimeters ItemPackageQuantity : 1 ItemShape : Round ItemTypeKeyword : piezo-transducers Manufacturer : ZIJIA Material : copper ModelNumber : ZJtek-1 NoiseLevel : 95 decibels NumberOfItems : 10 PartNumber : ZJtek-1 PowerSourceType : Corded Electric ProductDescription : Features: Widely use in computers, printers, copiers, alarms, electronic toys, automotive electronic equipment, telephones, timers and other electronic products for sound devices. It made of oscillator, the electromagnetic coils, magnets, diaphragm and housing and other components. After powered on, the audio signal generated by the oscillator current through the solenoid coil, the electromagnetic coil generates a magnetic field. Entangled in the diaphragm and the magnet solenoid Specification: Voltage: 5V Frequency: 2300Hz +/-500hz Diameter: 12mm Thickness: 9.5mm Color: Black Package includes: 20 x Active Magnetic Buzzer ProductSiteLaunchDate : 2016-11-14T07:28:17.106Z Style : Magnetic TargetGender : unisex UnitCount : 10 UnspscCode : 60130000 Voltage : 16 volts