Audible Indicators: Type - Single Tone Signal; Mode of Operation - Continuous Tone; Voltage - 24 VDC; Mounting Type - Screw Neck Panel Mount; Loudness - 95 dB @ 0.33 Ft; Current - 20 mA; Frequency - 2800 Hz; Material - Plastic; Color - Black; Temperature Rating - -25 to 50 deg C; Terminal Type - Solder Terminals; Terminal Size - 0.11x0.02"; Size - 1.14"Dia. x 1.90"Length (29.0x48.5mm); Mounting Size - 0.88" Dia. Panel Cutout; Manufacturer Series - Sonalert