HP4216BXW12 DC Piezo Audio Indicator Buzzer is apply for Network communication, motorcycle GPS locator.Automotive alarm .Usually the Rated voltage is 12V .The feature is alarm sound and high SPL.
HP4333AX Piezo Audio Indicator Buzzer ,apply for industrial machine, supermarket door and alarm .The feature is small size, low power consumption, high sound pressure, waterproof . Usually the Rated