Portable Megaphone Voice Amplifier Horn with Corded Microphone Earphone for Teachers ,Loud Volume

Double horns, long battery service life, no loss noise cancellation. Loudspeaker for teachers, travel guides, teaching, stall setting, and supermarket promotion. Help to relieve pressure on the throat, easy to give lectures or speaking. Multifunctional, also a bluetooth-compatible loudspeaker that can connection to a phone to play music. Digital frequency conversion, supporting multiple playback modes.