digital display multimedia 1.InputvoltageDC5V 2. Power output: 3W*2 3. Impedance:2X4 4. Frequency response: 150-18000HZ 2012 new arrival 2. ... 0 digital display multimedia speaker with usb/sd/mmc slotITEM NO ... to choose6. With storable 3.5mm dudio cable7. Built-in digital amplifier, saving energy8. Adapt to computer, laptop, DVD, VCD, ...