The Earthquake Sound BTA-502W speaker kit includes 2 AWS-502 all-weather speakers and the IW-BTA250 in-wall 2-channel amplifier. Earthquake's AWS indoor/outdoor speakers combine performance, reliability and aesthetics in one package. Enamel coated Anti rust aluminum grilles, high temperature UV treated enclosures and gold binding posts are only the beginning. In matte Black or white, these speakers are designed to blend well with any decor. With multiple mounting options including bracket or bookshelf style, the aws speakers are extremely versatile and easy to place in corners, and on bookshelves or in other tight places. AWS speakers will deliver the best performance whether indoors or outdoors and promise many years of trouble free sound quality and protection. The IW-BTA250 in-wall amplifier stays true to earthquake's legacy, packing flexibility, power and control all into one small discrete package. The 2-channel stereo amplifier can accept signal through the front panel 3.5mm stereo mini jack and via Bluetooth connection. With the provided 24 VDC power supply and cable adapter, the IW-BTA250 can produce 50 watts RMS per channel at 4-ohm. For added convenience, the IW-BTA250 also features a front mounted volume control knob. Designed to fit in most standard single-gang junction box, the IW-BTA250 can be easily installed in any New or pre-existing constructions (home, bar, restaurants, Etc.).