iPod Nano (trademarked, marketed, and stylized as iPod nano) is a portable media player designed and marketed by Apple Inc.. The first generation of iPod Nano was introduced on September 7, 2005 as a replacement for iPod Mini. It uses flash memory for storage. iPod Nano has gone through six models, or generations, since its introduction. The current "sixth generation" iPod Nano supports FM radio, a pedometer, and a 39.1-millimetre (1.54 in) square 240×240 display with a multitouch interface.