iPod nano 4

역사적 배경

At the Apple Let's Rock Event on September 9, 2008, the iPod nano 4th Generation was officially announced. It returns to the narrow form factor of the 2G model, while retaining and rotating the 2-inch (51 mm) screen from the 3G model. It is also thinner than both the 2G and 3G, measuring 90.7 mm (3.6 inches) tall by 38.7 mm (1.5 inches) wide by 6.2 mm (0.24 inch) thick, and weighing 36.8 grams (1.3 ounces). It has a curved aluminum shell and glass screen. The six previous colors (silver, charcoal, mint, turquoise, berry red, and rose pink) have been replaced by silver, black, purple, light blue, green, yellow, orange, red, and pink. Apple markets the new colors as "nano-chromatic". Also added is an accelerometer which allows the iPod nano to switch between portrait and landscape display modes by just tilting the iPod left or right, shuffle songs when shaken, and access Cover Flow when tilted sideways. Also you must turn the iPod nano sideways to watch videos. The UI has also been refreshed, adding a more stylized look in keeping with the new hardware design. It includes a new voice recording feature which starts automatically when an Apple compatible microphone is plugged in. It also includes the new "Genius" feature, introduced by Apple the same day. The Genius feature automatically creates playlists based on a selected song using an algorithm built by Apple. It is additionally touted as "the most environmentally friendly iPod Apple has ever made", containing arsenic-free glass and a BFR-, mercury-, and PVC-free design. It is also claimed to be highly recyclable. The iPod nano 4G will be shipped in cases similar to the 2G ones with the clear view in the front, and is marketed in two models: 8 GB and 16 GB. Limited quantities of an unannounced 4 GB model have surfaced in various markets.