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Horn Alarm 11ohm Siren Speaker 100W Metal Emergency Warning Speaker 12V 400-4000Hz 120-130dB, Find Details and Price about Ambulance Siren Horn Speaker Emergency Aluminum Speaker Horn from Horn Alarm 11ohm Siren Speaker 100W Metal Emergency Warning Speaker 12V 400-4000Hz 120-130dB - Wenzhou Jinzheng Safety Tech Co., Ltd.