Metal Classroom&conference sound system

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{"cid":"170346","pid":"27510312","pimg_url":"\/\/img1.b2bforus.com\/94\/e3\/805cce81b321\/product\/99355383_s-w400xh400.jpg","name":"Voice Amplifier for Safe Teachers and Interference Free Transmission Center Ceiling Mounted Classroom Conference Room Speaker","attrs":{"Price":"$555.00(>=1 Sets)","MOQ":"1 Set","Delivery Time":"Negotiable","Brand":"BD"}}

{"cid":"170346","pid":"27510303","pimg_url":"\/\/img1.b2bforus.com\/94\/e3\/805cce81b321\/product\/99355337_s-w400xh400.jpg","name":"Voice Amplifier For Teachers Radio 360 Degree The Same Sound Pressure Lecture School Class Room Teacher Level Audio Systems","attrs":{"Price":"$555.00(>=1 Sets)","MOQ":"1 Set","Delivery Time":"Negotiable","Brand":"BD sound"}}