iPod Touch 2nd Generation main features are: 

• Dimensions: 2.4" x 4.3" x 0.33" (61 mm x 110 mm x 8.4 mm) (W x H x D)
• Weight: 4.05 oz (114.8 g)
• 3.5-inch (diagonal) widescreen Multi-Touch display
• Wi-Fi (802.11b/g)
• 8 GB, 16 GB or 32 GB memory
• Holds up to 1,750, 3,500, or 7,000 songs in 128-Kbps AAC format
• Holds up to 10,000, 20,000, or 25,000 iPod-viewable photos
• Holds up to 10 hours, 20 hours, or 40 hours of vídeo
• Frequency response: 20Hz to 20,000Hz
• Impedance: 32 ohms
• 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
• Suports MobileMe, Microsoft Exchange, Yahoo! Mail, Google Gmail, e AOL e-mail services, plus IMAP e POP servers.
• Suports 17 languages, 30 international keyboards and 19 dictionaries.
• Built-in rechargeable lithium ion battery, with up to 36 hours of music playback time or up to 6 hours of video playback time when fully charged
• More information: http://www.apple.com
• Suggested price in the US: USD 229 (8 GB); USD 299 (16 GB); USD 399 (32 GB)