PIEZO ELECTRONIC TONE BUZZER ALARM. Opertional voltage range 2.4-15 volts.Thin profile (30mm diameter by 5mmin height).Package containing3 Buzzers. Click here to download a datasheetBrand new parts.Click the "Buy It Now" button toorder securely with any major credit card through PayPal! Same day dispatch! Fast shipping World Wide! 14 Days Money Back Guarantee! (pleaseread our 14 days MBG policy).* Please Check outour other items! * Be sure to addus to your favourites list!