1,colorful brick portable mini speaker for iPod /iPhone 2,mp3 speaker 3,do your own logo 4,Promotional ... -Retro style boom box style for iPod speaker-Stereo output -Powered directly from iPhone 3G,3GS / iPod, No batteries required. -Compact and lightweight,18g only-Audio ... -Frequency:50-150KHz -Total Continuous Power: 2*0.5 W-Color: white,black,blue,pink,yellow and etc... Technical Details Speaker Unit ...