This  iPod nano 4G Leopard Pattern Hard Plastic Case is designed for iPod nano 4G. It is made of high quality plastic material. It can protect your iPod nano 4G from damage, such as scratch, impact and shock. Easy installation and very convenient. It is just as good as the origial one.

Yes. Each iPod communicates a unique device identification number to your computer, allowing you to take advantage of automatic music transfers to your iPod even if you share a computer with another iPod user. You can choose to automatically update your entire music collection on multiple iPod players or choose to update selected playlists, allowing you to transfer custom playlists to individual iPod players.

iPod offers multiple ways to transfer music from your computer. You can set the transfer mode in iTunes 7 or later by selecting the iPod icon in the source pane to reveal the iPod settings. The following modes can be configured on the iPod:
1. Automatically update all songs and playlists. This is the default mode, in which your entire music library, including playlists, is automatically synced to your iPod. If the music library on your computer exceeds the iPod storage capacity, iTunes will offer to choose a selection of songs to sync to iPod.
2. Automatically update selected playlists. With this option, iTunes automatically copies only the playlists you have selected to iPod when you connect it to the computer. This option can be selected by accessing the Music tab of the iPod settings.
3. Manually manage music. You can also choose to transfer music to iPod manually. This allows you to drag and drop individual songs and playlists from iTunes to iPod. You can find this option by accessing the Summmary tab of the iPod settings.