The loud sound field anti-feedback technology protects both the throat and ears, delivering a wider sound field, highly accurate voice reproduction, and clear articulation. The upgraded DSP anti-feedback chip ensures silent operation during teaching or meetings, enabling confident speaking and comfortable listening. Battery life lasts up to two weeks on a single charge. Compact in size yet high in capacity, it features a built-in large-capacity battery—eliminating power anxiety for classroom use. True tone preservation goes beyond simple amplification. The custom high-end internal magnetic speaker offers strong anti-interference performance and weighs only half as much as standard speakers—delivering louder, clearer, and more natural sound with reduced weight. Bluetooth mode instantly transforms the device into a speaker. Equipped with Bluetooth 5.4, it minimizes audio loss and latency while improving connection stability and resistance to interference. Ideal for playing course materials, music, or audio dramas—smooth, uninterrupted, and responsive. USB-C charging eliminates charging concerns. The upgraded USB-C port replaces outdated round charging interfaces, doubling charging efficiency for fast, reliable power replenishment. Teaching assistant functionality meets modern educational needs. Supports playback via TF card and Bluetooth—serving not only as a voice amplifier but also as an audio playback tool for diverse content. One device, multiple uses—designed to simplify teaching. Color: Multicolor Material: ABS Package Contents: 1 x Microphone 1 x Amplifier 1 x Charging Cable Note: Actual product color may vary slightly due to lighting conditions and screen settings. Slight measurement variations may occur.