Bluetooth Portable High-Power Megaphone Speaker with Wired Headset Microphone — USB Rechargeable Voice Amplifier for Teaching, Easy to Operate

USB-rechargeable Bluetooth megaphone featuring high-power speakers that deliver clear, loud sound with broad coverage. Designed for teaching and public speaking, the unit comes with a wired headset microphone and simple controls for easy operation. Functions include voice amplification plus digital music playback. For optimal sound, hold the microphone head about 1cm in front of your mouth and speak directly into it. If howling (feedback) occurs, lower the volume and move the unit and microphone further apart to reduce interference. Recharge the battery after it has been fully discharged; if the device will sit unused for a long period, charge it once a week to maintain battery health.