Light weight and easy to use. Wireless Headphones upto 20Ft Range for Ipod,Mp3,Cd,Dvd,wireless fm radio. Package contains Wireless Stereo Headphone Set , Receiver Headset , Transmitter Base, Input Device Patch Cable. The headphones require 2 AAA batteries and the transmitter requires 2 AA. The headphones work great with most of the gadgets, but there are some brands/gadgets which may not be compatible with.