What is it for and how does it work - Motorola Mobility Bluetooth Stereo Gateway DC800 (98690/SYN1001) Wireless Adapter

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HI ....
Motorola Bluetooth Stereo Gateway DC800 is used as
Motorola Bluetooth Home Stereo Transceiver
By streaming music to your the Bluetooth Stereo Headphones, the Bluetooth Home Stereo Adapter turns audio devices such as home
stereos and MP3 players into wireless music systems. Just plug the
DC800 into your home stereo or MP3 player with an included RCA
cable or 3.5mm cable and you are ready to go. You can even hook
up to your RCA capable TV!

Thanks .....
With regards
Priya