Model 350WBX Vibratone® horn produces sound by electro-mechanical vibration of a diaphragm. The horn mechanism with diaphragm is attached to the grille. The water- and dust-tight back box is ideal for indoor or outdoor use. Model 350WBX features a die-cast zinc housing with a corrosion resistant polyurethane finish. The rugged outer grille resists vandalism without reducing sound output. The 350WBX is fused and utilizes a terminal block connection. Vibratone horns are excellent for general alarm, start/dismissal, coded paging and process control signaling in areas where their sound output exceeds ambient noise levels. Compact size and a variety of installation options make them ideal for institutional use. Available in 120VAC and 240VAC Coded or sustained tones Produces 100 dBa @ 10' (110 dBa @ 1m) Fuse terminal block provided for field wiring Surface, flush or semi-flush mounting Indoor/Outdoor use Type 4X, IP65 enclosure IP69K compliant CSA Certified UL and cUL Listed for Class I, Division 2, Groups A, B, C, and D; Class II, Division 2, Groups F and G; Class III