The SPK-W511 is a pair of high performance speakers that can be mounted on the wall vertically or horizontally. Great for use in indoor commercial areas. This product has perforated metal grilles, gold plated 2-way binding post terminals, and comes with two mounting brackets. Limited Supply While They Last. Closed Back Can; Woofer - 5.25(133mm); Tweeter - 5/8"; Impedance - 8O; Freq - 50Hz to 22kHz; Enclosure is white molded plastic; Brackets- painted steel with plastic knobs