Available in 30GB and 80GB models, the fifth-generation iPod holds up to 20,000 songs, up to 100 hours of video, up to 25,000 photos, or a combination of each. Improved music and video playback time means users can look and listen longer. New features, including an intuitive search function and gapless playback, have also been added. iPod is operated via the pressure-sensitive surface of the Apple Click Wheel. One motion of the user’s thumb is enough to navigate through the entire music, photo, and video collection and to play songs, skip, fast-forward, rewind, and adjust the volume.