Note: The color of the item may vary slightly due to photography and your own computerFeatures1.Widely use in computers, printers, copiers, alarms, electronic toys, automotive electronic equipment, telephones, timers and other electronic products for sound devices.2.Made of oscillator, the electromagnetic coils, magnets, diaphragm and housing and other components. 3.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 solenoidSpecifications:Voltage: 3VCurrent: less than 35mAFrequency: 2300Hz(around)Diameter: 12mmThickness 9.6mmColor: BlackWeight: 35gPackage included:20 x Piezo Buzzer Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Minnanxin