This buzzer has its own internal tone generator. Simply apply 4-12VDC to the positive leg and ground the negative leg of this buzzer and it will generate a 2.3kHz tone. No external electronics or circuitry are required to generate the tone, this is done internally. The tone is continuous as long as power is applied and measures ~85dB @ 5V. If you wish to control this with an Arduino or other microcontroller, we recommend using a transistor as it draws up to 35mA (more than a pin on the Arduino can handle)