This speaker comes with two wireless microphones that can rech up to 100 meter. It can play music with usb, bluetooth, or with memory card. It has bass, treble and echo, battery power indicator, mic interface, with mic & master volume controls. You can use it to play keyboard or guitar. It has bluetooth and radio which will select from mode button. You can push it on the floor like traveling bag.
It can last up to 6 hours, recharge before using it, (4 hours recharge).
Designed for teaching, evangelism, parties, public programs, etc. It has radio two wireless microphones, bluetooth, usb & sd interface for playing music.