--Coaxial speaker unit
--Carbon fiber water-proof cone for woofer
--High elastic surround
--13 core and PEI 0.05mm thick treble film
--Sound quality is delicate and powerful.
--The grille can easily be attached to the speaker by means of coil springs.
--Widely used in supermarkets, hotels, subways and so on.
--The Dustproof Level :IP 4X