The loud sound field anti-howling protects both the throat and the ears, and can output a larger sound field, highly restore the human voice and make every word clear. The newly upgraded anti-howling chip ensures that there is no noise in teaching meetings, so you can speak with confidence and listen comfortably. The battery life is two weeks after one charge. It has a small size, large capacity, and a built-in large-capacity battery. It refuses power anxiety and protects your classroom. Maintaining the original tone is not just a simple amplification. The new customized high-end internal magnetic speaker has strong anti-interference ability and weighs only 1/2 of speaker. The sound is louder, the restoration is better, and the weight is lighter. Bluetooth mode, instantly changes to a speaker, adopts the new Bluetooth 5.4 solution, reduces the sound quality loss and delay, and at the same time enhances the anti-interference ability and connection stability. Playing courseware, music and dramas without delay and continuous connection, vertical smoothness. New Type-C, charging without anxiety,, the newly upgraded Type-C charging port gets rid of old-fashioned round hole charging on the market, and the charging efficiency is increased by 100%, and charging is anxiety-free. Teaching assistant, meeting the needs of modern teaching, supports TF card/Bluetooth mode and other playback methods. It is not only a voice amplifier but also a playback assistant for various audio content. One machine has multiple uses, helping teachers to teach easily. Colour:Multicolor Material:ABS Package Contents: 1 x Microphone 1 x Amplifier 1 x Charging cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.