Mobile Speaker
Can play SD / MMC card, U disc
with the MP3 audio file formats
built in battery
double speaker

 1, max support 4GB SD Card / U Disk Player

2, with remote control function, remote control device only SD card / U disk works

3, with 3.5mm standard interface connector

4. Built-in 500MA rechargeable lithium battery

5. can work continuously 2-3 hours

6. Li-ion battery needs to be charged from 1.5 to 2 hours

7. pairs of speakers