Retaining all of the best features from the groundbreaking first generation unit, the second generation comes with a number of innovations that combine to create a greater audio experience for the user. A brand new feature to the X-Mini II is the "Buddy Jack" system. This allows you to connect one X-Mini II to another and another and... well, you get the picture. Capable of forming a near endless "Daisy Chain". Combine your X-Mini II with your friend's for quite simply jaw dropping audio! Built In 3.5mm Audio Connection.