澳大利亚采购需求：蜂鸣器扬声器，12v 蜂鸣器报警器，蜂鸣器报警器，压电蜂鸣器，电子蜂鸣器，无线蜂鸣器

We are in need of a 12V active piezo buzzer with internal drive capabilities. The ideal product should operate efficiently within a voltage range of 3 to 16V DC, specifically designed for 12V applications. We're looking for a buzzer that has a maximum current draw of 7mA and can produce a minimum sound output of 80dBA when measured from 10 cm away. It's crucial that the buzzer operates at a frequency of 4000 Hz, with a tolerance of +/- 500 Hz, delivering a continuous tone. Additionally, the operating temperature range should be from -20 to +70 degrees Celsius. The dimensions should be compact, with a diameter of approximately 13.8 mm and a height of about 7.5 mm, while maintaining a pitch of 7.6 mm. Please provide your product specifications, pricing, and availability at your earliest convenience.