Features: • 4'' full range driver for satellites and 6. 5'' bass driver for subwoofer • Heavy duty metal grill design • Plug & play USB/SD card reader • USB/SD reader supporting MP3/WMA dual formats decoding • Play/Pause, Next, Previous three buttons for USB/SD reader control • Built in AVR (Automatic Voltage Regulator) for wide main operating voltage range • High efficient energy saving design for Low Power Consumption • Side panel controls for volume and bass • Green LED power on indicator • Wooden cabinet delivers strong and low distortion bass