Redesigned for music and Multi-Touch, iPod nano is smaller and lighter than ever. You can clip it to your sleeve, jacket, or running shorts and keep your favorite songs at your fingertips - along with the Genius feature, a built-in FM radio, pedometer, and more. And the anodized aluminum finish in six bright colors makes this new design even more brilliant. Built-in clip Built-in FM radio with Live Pause Built-in pedometer Up to 24 hours of music playback New anodized aluminum colorSpecifications Display - 1.54 color TFT display, 240 x 240 pixel resolution Input/Output - Dock connector, Earphones jack External buttons - Volume control, Sleep/Wake button Sensors - Accelerometer FM Radio - Regional settings for Americas, Asia, Australia, Europe, and Japan, Live Pause Extra Features - Localized UI & VoiceOver (29 Languages) Audio Frequency Response - 20Hz - 20kHz Audio Formats - AAC (8 to 320 Kbps), Protected AAC (from iTunes Store), HE-AAC, MP3 (8 to 320 Kbps), MP3 VBR, Audible (formats 2, 3, 4, Audible Enhanced Audio, AAX, and AAX+), Apple Lossless, AIFF, and WAV Battery - Built-in rechargeable lithium-ion battery (up to 24 hours) Power - USB charged via computer or optional power adapter System requirements - Mac with a USB 2.0 port, Mac OS X v10.5.8 or later and iTunes 10 or later / Windows PC with Windows 7, Vista, XP Home or Professional (SP3) or later and iTunes 10 or later / Internet access is required and a broadband connection is recommended Dimensions (HxWxD) - 1.48 x 1.61 x 0.35 inches Weight - 0.74 ounce