The CPE-121 is a piezo buzzer transducer designed for audible signaling applications. It operates on a rated voltage of 12 Vdc but supports a wide input range from 3 to 28 Vdc. At its rated voltage, it produces a minimum sound pressure level of 83 dB at 30 cm with a typical frequency of 4.5 kHz, while consuming a maximum of 13 mA. This model includes wire leads and a feedback terminal, allowing for integration with external driving circuits for precise control. With its compact Ø24.0 x 5.0 mm dimensions and wide operating temperature range, the CPE-121 is well-suited for alarms, user interfaces, and other electronic where space is limited.