This trolley speaker come with two wireless handheld microphones that can reach upto 100 meter.
it can play music with usb, bluetooth or with memory card. It has disco light, bass control, treble control, echo control, mic port, and battery indicator.
you can use it to play keyboard or guitar.
it has double switch one for on & off and one for disco light.
it has bluetooth and radio which will be selected from mode button at back of the speaker.
You can push it on the floor like traveling bag.
you will get more details about this speaker inside the manual