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This is a Piezo Siren with 12Vdc, 120dB, Warble and Hi-Lo Tone.
CUI Devices Sirens utilize piezo technology with a built-in driving circuit, while offering through hole, panel mount, and wire lead mounting styles. CUI Devices Piezo Sirens feature sounds pressure levels (SPLs) up to 120dB and rated frequencies from 2500Hz to 2900Hz. These piezo sirens offer a range of variable tones and sounds, including hi-lo, warble, and more. With operating temperature ranges from -40°C up to +85°C, these piezo sirens are ideal for security systems, medical devices, industrial applications, and more.