Acoustic Research Portable Wireless Speaker with 900MHz and 3.5mm Input Enjoy music wirelessly from up to 150ft* away through 900MHz technology and included transmitter High-quality, full, rich sound anywhere - outdoors, indoors or on the go Add multiple units wirelessly to transmitter to expand your listening environment 3 selectable broadcast frequencies  for best possible reception Includes AC/DC power adapter or play up to 12 hours with 6 AA batteries (sold separately) AUX input for other wired sources 1 mini jack to stereo lead adapter and 1 3.5mm cable included *Range may vary according to environment