Eliminate messy wiring, with the AW-871. This Acoustic Research main speaker has a powerful transmitter that sends audio signals through ceilings, floors, and walls up to a distance of 300 feet. Powered by a 120-volt battery, this wireless stereo speaker flaunts peak power handling of 20 watts, and sensitivity of 55dB, for powerful sound even with minimal volume. A 5.25-inch woofer and 1-inch tweeter, this Acoustic Research main speaker will give you audio experiences you will never forget, while a wide frequency range of 20 - 20,000 Hz means clear and precise audio output. The dual power mode, battery charger indicator, and channel switch, of this wireless stereo speaker only add to its flexibility and convenience. Make your home a party hot-spot, with some help from the AW-871.