Sharper Image SBT623BK Set of 2 Bluetooth Speakers With Lights, True Stereo Portable Sound System, Rechargeable These Sound-Responsive Wireless speaker from Sharper Image are not just a unique addition to rec rooms and bedrooms -the embrace a completely wireless approach to stereo sound. The two speaker work together to play right and left audio channels with no connecting wires between them. Place this sound-responsive speakers on either side of the table or desk to totally envelop the area in rich stereo sound and bring sound-responsive lights. Cycle through light options that dance and move to the musics beat, or activate a preprogrammed setting to strike the right mood. After a long night, plug in the speakers and recharge them for another day of continuous use.