1.Supports microSD card,Computer.USB, can play MP3/WMA music file formats 

4.With LED light indicator 

2.Input: Apple's iPod dock, 1/8-inch (3.5mm) mini stereo jack 

3. Output: RMS 6W(3W+3W) THD=10% 

4. Frequency response: 150-18000HZ (+-3DB) 

5. Signal and noise ratio of power amplifier:>=80Db 

6. Loud Speaker: 1.77 inch (external diameter 45mm), Magnetic resistant 4 Ohms 

7. Power supply: 5V/1000mA AC power adapter, Computer USB Power rotate connect line (can choose), Built in Rechargeable Li-ion Battery 

8. Line in port: Free Mini 5Pin Retractable Cable