The microKORG was released in 2002 and is still in production . It is considered one of the most popular music synthesizers in recent history, with estimated 100,000 units sold as of May 2009. In September 2007 Korg released a limited edition of the microKORG with reverse-color keys although the functionality was otherwise unchanged. At NAMM 2008, a successor called the microKORG XL was introduced. Available since early 2009 it uses MMT Multi Modeling Technology from Korg's newer and more powerful Radias/R3 synthesizers.