Details:

includes wireless transmitter and amplified speaker
Controlled Dispersion Array and Polk Digital Logic technology simulate 5.1- or 7.1-channel surround sound
room position switch optimizes speaker's sound for floor, table, or shelf location
speaker contains four 2-1/2" full-range drivers and 5-1/4" woofer
built-in 120-watt digital amplifier
frequency response: 48-20,000 Hz
speaker-level and line-level inputs on the transmitter for up to four surround channels
30-foot wireless range (from transmitter)
speaker measures 19-1/2"W x 8-1/8"H x 7-13/16"D
transmitter measures 7"W x 1-11/16"H x 4-7/8"D
Gear4Less warranty: 5 years speaker, 3 years electronics