Professional speaker with classic design With USB/ Card Reader function With FM Radio function Specifications: Model PA-620 PA-820 PA-1020 Output Power 30WX2 60WX2 80WX2 Speaker Unit 1" X1+ 6" X1 1" 1+ 8" X1 1" X1+ 10" X1 Frequency Response 20-20KHz 20-20KHz 20-20KHz Impedance 4ohms-8ohms 4ohms-8ohms 4ohms-8ohms Dimensions( MM) 260X240X396 280X300X500 320X300X530 40HQ( SET) 1360 700 550