100% waterproof enclosure & speaker system; High-density ABS construction with UV coating; Steel-reinforced mounting brackets fits most towers; Polypropylene speaker cones & titanium tweeters; Quick-disconnect compression terminals; Meets RoHS & CE certifications; Imp: 4ohm ; 500W max; 250W RMS; Freq resp: 40Hz-20kHz; Efficiency: 90dB @ 1W/m; Includes braided stainless steel safety cable & stainless steel mounting hardware; Dim: 8.5″H x 8.5″W x 9″D; Titanium; Pair;