Wireless speaker, with high technical content and loud sound. Including microphone, amplifier circuit, speaker technology, if not well matched, it will affect the use of the whole machine. This machine is more convenient than wired, and the power can be selected according to the needs of different occasions. It is an indispensable helper for various sales, morning exercises, tour guides and other industries. The machine of Hefei Ruicheng Technology is good, you can go and have a look.