Model No. :- Apple iPod Nano 4GB (Silver)

Specifications

Size and weight 
Height: 2.75 inches (69.8 mm)
Width: 2.06 inches (52.3 mm)
Depth: 0.26 inch (6.5 mm)
Weight: 1.74 ounces (49.2 grams)

Capacity
4GB flash drive
Holds up to 1,000 or 2,000 songs in 128-Kbps AAC format
Holds up to 3,500 or 7,000 iPod-viewable photos
Holds up to 4 hours (4GB) of video4
Stores data via USB flash drive

Display
2-inch (diagonal) liquid crystal display with blue-white LED backlight
320-by-240-pixel resolution at 204 pixels per inch

Audio
Skip-free playback
Frequency response: 20Hz to 20,000Hz
Audio formats supported: AAC (16 to 320 Kbps), Protected AAC (from iTunes Store), MP3 (16 to 320 Kbps), MP3 VBR, Audible (formats 2,3,and 4), Apple Lossless, AIFF, and WAV
User-configurable maximum volume limit

Video
H.264 video, up to 1.5 Mbps, 640 by 480 pixels, 30 frames per second, Low-Complexity version of the H.264 Baseline Profile with AAC-LC audio up to 160 Kbps, 48kHz, stereo audio in .m4v, .mp4, and .mov file formats; H.264 video, up to 2.5 Mbps, 640 by 480 pixels, 30 frames per second,Baseline Profile up to Level 3.0 with AAC-LC audio up to 160 Kbps, 48kHz, stereo audio in .m4v, .mp4, and .mov file formats;MPEG-4 video, up to 2.5 Mbps, 640 by 480 pixels, 30 frames per second, Simple Profile with AAC-LC audio up to 160 Kbps, 48kHz, stereo audio in .m4v, .mp4, and .mov file formats

Headphones
Earphones
Frequency response: 20Hz to 20,000Hz
Impedance: 32 ohms

Mac system requirements
Mac computer with USB 2.0 port
Mac OS X v10.4.8 or later
iTunes 7.4 or later

Windows system requirements
PC with USB 2.0 port
Windows Vista or Windows XP Home or Professional with Service Pack 2 or later
iTunes 7.4 or later

Languages
Czech, Danish, Dutch, English, Finnish, French, German, Greek, Hungarian, Italian, Japanese, Korean, Norwegian, Polish, Portuguese,Russian, Simplified Chinese, Spanish, Swedish, Traditional Chinese, and Turkish

Environmental requirements
Operating temperature: 32? to 95? F (0? to 35? C)
Nonoperating temperature: -4? to 113? F (-20? to 45? C)
Relative humidity: 5% to 95% noncondensing
Maximum operating altitude: 10,000 feet (3000 m)

Input and output
Dock connector
3.5-mm stereo headphone jack

Power and battery
Built-in rechargeable lithium ion battery
Playback time
* Music playback time: Up to 24 hours when fully charged
* Video playback time: Up to 5 hours when fully charged
Charging via USB to computer system or power adapter (sold separately)
* Fast-charge time: about 1.5 hours (charges up to 80% of battery capacity)
* Full-charge time: about 3 hours 

Warranty :- One Year.