What is the difference between ScreenBeam Wireless Display and ScreenBeam Kit?

ScreenBeam Wireless Display and ScreenBeam Kit both provide support for Miracast, Intel® WiDi, and Actiontec Wireless Display technologies. The ScreenBeam Kit contains a USB Transmitter, enabling Windows devices that do not support Miracast or Intel® WiDi to use Actiontec Wireless Display software to connect to the ScreenBeam receiver. ScreenBeam Wireless Display includes only the receiver and is intended for users who only have devices which support Miracast and Intel® WiDi.