... 2*50W 2.best for multimedia classroom 3.MP3,CD,PC input 4.CE,FCC,ISO,ROHS 5.wooden closure,2.0 two way speaker 2 ... .Amplifier speaker/active speaker: it has inbuilt amplifier,and simple installation.Function Discriptions :Channel: 2.0 two way Material :wooden case,MDF, ... in 1-3 working days after receipt of the payment.Sometimes,the delivery time depends on the quantity. 2.0 classroom active speaker ...