Product discriptions:

This PT-1275i portable sound system combines clear and powerful sound with portability and simplicity.  Perfect for schools, conferences and presentations, as well as morning exercises, the PT-1275i is the ultimate in portable sound.

Product features:
Support USB, / TF card with MP3 format
Wide range power supply
Support wire and wireless microphone, USB/TF and other audio input in the same time
Light weight, easy to carry, can station on the desk or tripod
With lithium battery, light weight to carry
External 6.3 sound wired socket input 
With Bluetooth included