The Sony G-Tank is a powerful Hi-Fi System with iPhone/iPod dock. It can also play audio from cd's and gaming systems via USB port. The system has double illuminated 2 ways speakers at 220 watt power output. The G-Tank is also equipped with two 4cm tweeters to provide you with a complete range of sounds. It is a portable system as there are two handles mounted in front of the unit and there is also a remote which can control your iDevice when docked. The 2 speakers light up with the beat of your music but can be turn off when desired. The G-Tank gives listeners the sounds of full speaker setup in one convenient device. It has received great reviews and is highly recommended.