Philips Mini Speaker System SBP1100 http://www.greendust.com/Mini-Multimedia-Speakers-philips-mini-speaker-system-sbp1100-p-15945.html 100-18 000 Hz frequency response Small and lightweight speakers to take anywhere Share your music with your friends using these handy, powerful and compact speakers Plug and play with your MP3, CD player or your laptop Powerful speaker drivers for ultra realistic sound Bass pipe emphasizes low tones for a clear, realistic sound Wide stereo sounds stage when speakers are placed apart Small and lightweight for carrying in your pocket or bag Universal use with all portable entertainment equipment No batteries required for extra convenience 100-18 000 Hz frequency response 100-18 000 Hz frequency response