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SAINTLARK S1 Voice Amplifier，with Wired Portable Voice Amplifier and Belt Supports MP3 Format Audio,Teacher Microphone for Classroom forpedagogical, Training,presentations, Guided Tours
$35.00 buy or more info -
SHIDU Voice Amplifier Teachers,Megaphone Speaker Portable PA System with Microphone Headset(Work of 12hours) Supports MP3 Format Audio for Tour Guides Coaches Yoga Fitness Instructors
$33.99 buy or more info