AUDIO UNLIMITED 900MHZWRLS STEREO HDPHNS ECOM WRLS STEREO HDPHNSAudio Unlimited gives any user the ability to listen to audio or music just about anywhere without the hassle of cumbersome wiresPowerful transmitter uses 900MHz technology to send audio or music through walls and floors to the wireless headphones up to 165' awayHigh-quality lightweight over-the-ear headphones 40mm woofers and 10watts RMS3-channel selection for best possible performanceIncludes DC 2.4V batteries, wireless transmitter base with AC adapter, 2 AAA 1.2V rechargeable Ni-Cd batteries and 3.5mm to RCA and 3.5mm to 1/4' adapter