Incorporating the fabulous Apple Click Wheel that was first introduced on iPod mini and offering up to 12 hours of battery life, the iPod continues to define the perfect digital music player for Mac and Windows. Weighing in at just 158 g (5.6 ounces) and getting slightly thinner with each new generation, this fourth-generation iPod offers huge capacity, letting you easily slip up to 5,000 (1) songs into your pocket.