SelecTone Hazardous Location Amplified Speaker, UL Fire Listed - Available in 24VDC. Four wire supervisable power circuit. Capable of producing tones or voice messages. Built in gain control. Digital signal amplification. Fused input and output. Cast aluminum housing, spun aluminum projector. External mounting tabs. Indoor/outdoor use. Type 4X, IP66 enclosure. IP69K compliant. CSFM Approved. 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. UL Fire Listed and ULC Fire Listed models available.