speaker with iphone 4S docking station

Specifications

USB speaker

Product name:2.0 multimedia audio

Product model:SA-118 4S

2.0-Channel Home Theatre Speaker System

Built-in USB and Card reader

Power:RMS 200W(L/R:100W)

Rated Impedance:4Ohms-8Ohms

SNR:more than 89 dB 

Sizes of Speakers:8″woofer+3″full range+20 horn treble

Frequency Response:40Hz-18KHz

Packing Size:360(L)×345(W)×665(H)mm

Loading Quantity:

20′(28m³):339pairs 40′(58m³):702pairs 40′HQ(68m³):823pairs