The GoGroove BlueSync OR3 is a wireless speaker that utilizes A2DP Bluetooth v2.1+EDR for high-fidelity audio.  It allows you wireless stream audio from your iPhone, iPad, iPod Touch, Mac, Android, Windows Phone, or any other device with Bluetooth.  It has a battery that should be good for about 16 hours of continuous music playback and is super simple to use.

In this video I review the BlueSync OR3 after using it for about a couple weeks.

BlueSync OR3: