Edwards Signaling AdaptaHorn Vibrating Horn, Grille Heavy Duty, Series: 870, 120 V AC, 0.13 A, 15.6 W Power, 50/60 Hz Frequency, 113/103 dB Sound Level, Indoor Indoor/Outdoor, Specifications Met: UL Listed, FM Approved,, Surface Mounting, Die Cast, Gray, 5 in L x 2-1/8 in W x 5 in H Dimensions