Panasonic's SC-PM71SD Micro Audio System gives you superior digital music in multiple formats. This small audio system accepts SD Cards for record and play -- load up the digital music you play on your PDA or MP3 player and enjoy. You can also record directly from CD to the SD card, for easier file transfers. Apart from that important feature, this compact sound system performs like those that are 4-times its size. Panasonic's hybrid bi-amp drives independent speakers for low and high frequencies for more precise sound integrity. Using the optimum drive system for each speaker assures reproduction of the high frequencies over an extended range, which results in wide-range audio reproduction. You also get an exceptionally powerful sound at 40 watts per channel. At 4 channels, that's 160 watts total power. And since it's a low-noise amp, you can enjoy clear reproduction of even quiet sounds. There's even a built-in AM/FM digitally tuned radio. If your mobile phone, PDA, notebook or other device has an SD card reader and is capable of having a speaker or headphone, you can listen to music you've recorded directly to an SD card. At home, you'll just love listening to this system. Park yourself in a comfortable chair and stay there thanks to the included full function remote control. The large, bright display makes it easy to see disc and track info from a distance. Sit back and listen.MP3, CD-R/RW, WMA and HighMAT playback with re-master function for excellent sound covering the recording's full dynamic rangeSD Audio playbackHybrid Bi-Amp SystemH.BASS Sound - Harmonized Bass sound enhancement selectableMASH 1-bit Digital Analog Conversion SystemProgrammable timer for recording, play, and sleepWood Grain Speakers with detachable grilles