Edwards Signaling Lumatone Electronic Signal, Pulsating Audio/Visual, Series: E100, 12 to 24 VDC, 0.016 to 0.03 A, 1-11/25 in Diameter, Black Lens, 90 dB Sound Level, 2.8 kHz Tone Frequency, Panel Mounting, 0 to 55 deg C, High Impact Polystyrene, 1-3/4 in W Dimensions