Complex sentence: In 2007, Tiger Electronics released the iDog Amp'd, an upgraded version of the iDog with stereo speakers which nodded its head and tapped its foot in time to the music being played on it.
Split into simpler sentences: In 2007, Tiger Electronics released the iDog Amp'd. It was an upgraded version of the iDog with stereo speakers which nodded its head and tapped its foot in time to the music being played on it.