Feature: Model: ZT-513A Rated Power: 10w Line Voltage: 70-100 v Sensitivity: 91dB Frequency Response: 90-16000HZ Londspeaker: 131mm Dimension: 145X590mm Material: ABS Weight: 1.35 KG Application: Widely used in in taproom Hotel, emporium, school, auditorium, gymnasium, exhibition center, and so on.