Mallory Sonalert Products SCE028LD3DT7B Brand/series: Sonalert?® Capacitance @ Frequency: - Color: Black Color, Housing: Black Current Rating: 40mA Current, Rating: 40 mA Frequency: 2.9kHz ID_COMPONENTS: 1691817 Lead Free Status / Rohs Status: RoHS Compliant part Material, Construction: Nylon Mode, Operating: Fast Warble Mounting Type: Panel Mount Operating Mode: Dual Tone Operation: Fast Warble Primary Type: Alarm Series: Sonalert?® Size / Dimension: Circular - 42.85mm Dia x 35.85mm H Sound Level: 75 to 85 dBA Sound Pressure Level: 85dB ~ 95dB Temperature, Operating, Maximum: 65 ?°C Temperature, Operating, Minimum: -30 ?°C Termination: Terminal Block Tone: Warble Type: Piezo Indicator, Internal Drive Voltage - Rated: 16 ~ 28VDC Voltage Range: 16 ~ 28VDC Voltage, Operating: 16-28 VDC Voltage, Supply: 16-28 VDC