Portable mini speaker for iPod touch nano shuffle classic iPhone 
Specification: 
1. Portable Audio Speaker System designed for iPod iPhone 
2. Surprising deep Bass Revolutionary--- MaxBass® Technology creates high-class bass without a sub-woofer 
3. Support: MP3/MP4/CD/PC/MAC/PSP/iPod/iPhone 
4. Output: 3W*2 
5. Frequency response: 200-18kHz 
6. Impedance: 4ohms 
7. Input power: DC 5V.