https://www.global-be-star.com/bestar-high-power-avas-speaker-bls5050-12-04h255w105j-p10/
Famous BESTAR High Power AVAS Speaker BLS5050-12-04H25.5W105J-P10 Factory, Manufacturers | BESTAR
BLS5050-12-04H25.5W105J-P10 AVAS Speaker is a high performance acoustic component designed for Automotive Vehicle Alerting Systems (AVAS).