This RadioShack SEALED 273-0068 Piezoelectric Buzzer is a reliable and high-quality device suitable for a variety of applications. With a resonant frequency of 2.8kHz and a supply voltage range of 4-28vdc, this buzzer is capable of producing a pulse or constant sound pattern in a round shape. The device operates on DC current and features a Piezoelectric horn type, making it ideal for use in electronic components and semiconductors, buzzers, and speakers. Its brand is Archer, and it falls under the categories of electrical equipment and supplies as well as business and industrial. This buzzer is an excellent addition to any project that requires a reliable and high-quality piezoelectric buzzer.