There are a huge number of docks on the market today for the iPhone. Many of those docks require the iPhone or iPod to be physically plugged into the dock for music to play. There are also a number of systems that allow you to stream music to the device using Bluetooth. The catch is that the Bluetooth wireless systems don't charge the iPhone and your battery can drain quickly.

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XtremeMac has unveiled a new audio solution that works with the iPhone and the iPad that combines features of a normal docking station with a wireless Bluetooth dock. The audio system is called the Tango TRX and it uses a 2.1 configuration. The device offers high quality Bluetooth streaming from a remote docking station that can be connected to the AC outlet for charging the iPhone while it plays. A second dock is built into the main device.

The speakers inside the Tango TRX include a pair of mid-range drivers, a pair of dome tweeters, and a down firing sub. Other features of the dock include a line-in jack for connecting non-dockable devices and a multifunction remote control. A free app also integrates with the system to allow control over the sound and the music it plays. The Tango TRX is shipping now for $179.99, the version of the dock with the separate dock to charge while playing via Bluetooth is an Apple Store exclusive selling for $199.99 and is called the Tango TRX D.