Jensen JW250 SONIX Wireless Stereo Speakers (Discontinued by Manufacturer) Wireless stereo speakers work with any audio or video source with a .125-inch minijack or .25-inch headphone terminal 900 MHz RF transmission works through walls and other obstacles (no line of sight required for transmitter) Convenient, single-knob operation (on, off, volume), selectable audio (left, right, mono) 150-foot operational range AC power and audio adapters included