Edifier extraordinary usb speakers

Features : Play Audio files directly from USB Flash Drive or SD/ MMC Card. Even without connecting to PC or DVD/VCD Player. Built-in FM Radio High Output This system has output power upto 2000 Watts (P.M.P.O.). USB Port Play MP3 files directly from Flash Drive. SD/MMC Card Slot Just Plug in the SD/MMC Card in Card Slot and enjoy audio. Hi-Fi Sub-woofer The Hi-Density sub-woofer is capable to provide high class bass output. 2.1 Channel Sound Included 2 Satellite Speakers to Handle higher frequency and 1 Sub-woofer for lower frequency. This combination makes extraordinary sound quality. 4″ Sub-woofer Drive Unit Big Speaker, Big Base. This Speaker system has 4 Inch Sub-woofer Specifications : Power Output: 2000W (P.M.P.O.), 30W (R.M.S.) Frequency Response: 60Hz ~ 16Khz Drive Unit: 4″x1 +2.5″x 2