1.MSN Portable Speaker for computer and mobile phone and other audio devices.
2. Play MP3 format music from TF card
3. With key chain, you can hang it with bag or mobile phone
4. dual way power: build in Li-ion and USB power
5. color optional
·Voltage: DC 6-9V ±0.5V/500MA
·Signal And Noise Ratio of power amplifier: > 80dB
-play music directly from your USB flash drive and MicroTF card.
-One full charging, play non-stop music from 3 - 10 hours.
-Line Out jack - to connect your iPod, iphone and MP3 player
-Line In jack to connect headphone when you don't want to disturb others.