--Exchange input modes between constant voltage and constant impedance.

--Two frequency superior quality ceiling speaker.

--Wide frequency response.

--with the barrel after the low-frequency.

--Carbon fiber water-proof cone for woofer

--Imported silk silver 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