Create great loud alarms with these active continuous sound beepers from PMD Way. Simply connect between 3 to 24V DC and stand back. Use the options menu to select pack size. Specifications: Operating voltage: 3~24V DC Operating current: 10mA at 12V DC Sound pressure level: 95 dB Resonant frequency: 3.3 kHz Operating temperature: -20 to 45 degrees C Dimensions: 30mm between mounting holes body is 23mm in diameter body height is 11mm Don't forget to check out our full range of speaker and related products if this doesn't meet your needs. And as always, all orders receive free delivery. And remember ... if you: can't find what you need not sure what to order want a bulk deal need technical support or just want to have a talk ... Please email us via [email protected]. To keep up to date with new products, news, tutorials and more - we're on x, Facebook, Instagram, threads, reddit, and instructables.