4GB flash drive Holds 500 to 1,000 songs in 128-Kbps AAC format Holds up to 25,000 iPod nano-viewable photos Stores data via USB flash drive Display 1.5 inch (diagonal) liquid crystal display with blue-white LED backlight 176 x 132 pixel resolution, .168-mm dot pitch Support for display of multiple languages and characters simultaneously Audio Skip-free playback Frequency response: 20Hz to 20,000Hz Audio formats supported: AAC (16 to 320 Kbps), Protected AAC (from iTunes Music Store), MP3 (16 to 320 Kbps), MP3 VBR, Audible (formats 2, 3 and 4), Apple Lossless, AIFF and WAV Upgradable firmware enables support for future audio formats Headphones Earbud-style headphones with 18-mm drivers using Neodymium transducer magnets Frequency response: 20Hz to 20,000Hz Impedance: 32 ohms Customizable settings Customize main menu Create multiple On-the-Go playlists Adjust audiobook playback speed Clicker playback through headphones Rate songs Shuffle songs or albums Repeat one or all Sound Check on or off 20 Equalizer settings Backlight timer Display contrast Alarms on, off or silent Sleep timer Date and time Display time in menu bar Power and battery Built-in rechargeable lithium ion battery Playtime: Up to 14 hours when fully charged Photo slideshow with music viewing time: Up to 4 hours when fully charged Charging via USB or FireWire to computer system or power adapter Currency: Unit Price: Quantity: Delivery: