Headworn Portable Personal Voice Megaphone with Microphone — 80mm Composite Horn, Clear Surround Sound

Designed for hands-free, headworn use, this portable personal megaphone delivers clear and reliable voice projection. It features an 80mm large-diameter composite high-pitched crystal magnetic horn paired with a carbon atom lattice graphene diaphragm to faithfully restore the natural human voice. Anti-whistle performance is improved through IC/CVC dual technology combined with acoustic expert tuning of the three-tone ratio and the principle of frequency shift, which greatly reduces whistling frequency. Power is provided by a lithium-ion battery — based on a teacher's use frequency of 2 classes per day, a normal full charge can be used for about 2 weeks. Voice loop broadcast is supported: plug in a memory card or U disk to start continuous loop playback of lesson-preparation recordings. Ideal for teaching, tour guiding, promotions, parties, etc.