AudioMaster Public Address Explosion-Proof 30 Watt Speaker, Gray - 15 watt (AM300X) or 30 watt (AM302X). 25 or 70 Vrms. Transformer coupled. Re-entrant horn design. Heavy-duty U-bracket swivel mount. Type 4X, IP65 enclosure. CSFM Approved (Model AM300X only). UL and cUL Listed for Class I, Division 1, Groups B, C and D & Class I, Division 2, Groups A, B, C and D & Class II, Division 2, Groups F and G & Class III. UL Fire Listed.