1. CE, FCC, CCC, ISO9001/14001 certified 2. Manufacturer with 9 years experience 3. public address system Ceiling Speaker pa public address system Ceiling Speaker1.Fashion appearance, ABS material enclosure, Iron grille2.Speaker drum-paper use compound material, sound clear and melodious3.With mounting brackets, easy & flexible installation4.Audio line input: COM 100V5.Suit for indoor, such as ...