【Portable ultra large volume】 HJ Voice Amplifier Speaker Suitable for teachers/tour guides/speeches/conferences etc（Teaching LoudspeakerMicrophone For TeachingLapel MicrophoneVoice Amplifier Bluetoothteacher lavalier microphone ）

Material: ABS. Size: 827334 mm. Power: 5W. Battry capacity: 10000mAh. Charging time: 4h. Working time: 6-8 hours. Life time: up to 15 hours. Playback mode: support USB flash drive playback and TF card playback. Details: GOOD HELPER FOR YOU: Amplify your sound in crowded occasions. This voice amplifier can provide 5w clear and soft sound to cover about 1000 square meters, let everyone hear what you say. HIGH SOUND QUALITY: Surround 3D sound field, provides high sound reproduction and clearer sound quality, make your voice clear and soft, and will not produce harsh noises. SMALL AND PORTABLE: compact and lightweight, it will not burden you too much. Comes with an adjustable strap, allows you to wear it on the waist or hang around the neck. MUSIC PLAYER FUNCTION: It supports USB flash drive playback and TF card playback, you can repeat a single tune, loop all music, and switch songs/recording content, you will never miss any important information again. WIDELY USE: Great for teachers, t