Model : ZT-208 Rated Power : 50-80w Line Voltage: 70-100 v Impedance: 8 Sensitivity: 92dB Frequency Response : 40-20000HZ Londspeaker : 220/35mm Material: ABS Dimensions : 450X265X255mm Weight: 7.30KG Application : widely used in in stage equipment ,Hotel, emporium ,school ,auditorium, gymnasium ,exhibition center ,park ,and so on .