<P> After Bose released the SoundDock series II, the original SoundDock was discontinued in the United States . But as of 2009, a redesigned SoundDock version 2 is currently being sold in the UK along with all the other SoundDock products . The docking station for the SoundDock version 2 is now "Made for iPhone" certified and now charges via USB . </P> <P> Manufacturing quality control is aided by the Bose Syncom measurement system designed in 1972 . </P> <P> On August 21, 2008 Bose announced the SoundDock Series II system to supersede the original SoundDock effective September 2008 . This edition is GSM - shielded for iPhone use, has a 3.5 mm stereo jack for other devices (e.g., CD player), and the same sound infrastructure found in the Portable edition addressing sound problems from the original release . The system was released on September 18, 2008 . </P> <P> On December 8, 2012 Bose announced the SoundDock Series III for iPod and iPhone models with a Lightning connector . In addition to the Apple Lightning Connector, MP3 players and other smartphones can be connected through a 3.5 mm stereo jack . The Bose SoundDock Series III was rated positively by Techskunk who found that it delivered a rich sound even at low volume . </P>

What is the difference between bose sounddock series 1 and 2