Bluetooth Portable High-Power Megaphone Loudspeaker with Wired Headset Microphone & USB Charging — Wide Coverage for Teaching

Multifunctional portable voice amplifier built for teaching and broad-area sound coverage. Equipped with high-power speakers, it produces clear, loud audio that transmits across a wide range. The unit supports Bluetooth and digital music playback while offering USB charging and a wired headset microphone for hands-free use. For best amplification, hold the microphone head about 1cm in front of your mouth and speak directly into it. If you experience howling or feedback, reduce the volume and move the device and microphone farther apart to avoid interference. It is recommended to recharge the battery after it has been used up; if the amplifier will sit unused for a long period, charge it once a week.