Headworn Portable Voice Megaphone with Microphone — 80mm Loudspeaker, Surround Sound, High Volume

Compact headworn megaphone built for clear speech reproduction and long battery life. It uses an 80mm large-diameter composite crystal magnetic horn paired with a carbon atom lattice graphene diaphragm to faithfully restore natural human voices. Whistling is minimized by IC/CVC dual technology combined with acoustic expert tuning of the three-tone ratio and frequency-shift principles to significantly reduce whistle-prone frequencies. A built-in lithium-ion battery provides extended runtime — based on a teacher using the unit for 2 classes per day, a full charge typically lasts about 2 weeks. For lesson playback, insert a memory card or U disk to enable continuous looped broadcasting of prepared recordings. Suitable for multiple scenarios including teaching, tour guiding, promotions and parties.