The wireless microphone pull-rod teaching stick introduced in this article combines an FM wireless microphone and a portable pull-rod teaching stick into one. The metal part of the teaching stick is cleverly used as the transmitting antenna of the microphone. It has high sensitivity and excellent fidelity. The reliable working area is less than or equal to 2,000 square meters. Using one or several FM recorders can make the voice distribution of the students even and have a three-dimensional reverberation feeling, which has a certain effect on enhancing memory. In addition, students can record the key points and related content of the course at any time and ask questions after class.
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