A BAG HAVING AMPLIFIER AND SPEAKER FOR SERVING BOTHAS A WIRE AND WIRELESS FOR LECTURE

摘要

The intended user (or instructor) is a person's voice to select the external device user (or instructor) for the audio signal and the video signal of the (cassette, audio, video, TV, computer, cable TV, satellite tuner, Karaoke, etc.) and mixing at the same time as the wire Sikkim output to the TV monitor while listening, it is composed a voice signal and the user's own voice signal from an external device to the external speaker as an output or a wired or wireless transmission to an external receiver.; Thus, the present design is school, the school's computer lab, language siseup room, installed in the multimedia classroom can enhance the educational neungyul using an external audio devices, also conveniently it supports the progress of the class front-line teachers, and students are teaching as well as to be able to focus, it is easy to carry.