The specifications  for the iPod Touch are:

• Screen material:glass(arsenic free)
• Screen size: 3.5 in
• Screen resolution: 320x480 px at 163ppi, with 3:2 aspect ratio
• Input method: Multi-touch screen interface, Sleep/Wake button, Accelerometer, Home button, Volume Rocker buttons (2nd/3rd generation), voice control (3rd generation)
• Operating system:iPhone OS (current version 3.1.3, build 7E18)
• Storage: 8, 32 and 64GB flash memory
• CPU: Initially ARM 400MHz, but now 412 MHz for 1st generation, 533 MHz for 2nd generation and ARM Cortex-A8 833 MHz underclocked to 600 MHz for 3rd generation
• GPU:PowerVR MBX Lite in 2nd generation and PowerVR SGX GPU for 3rd generation
• RAM: 128MB DRAM in 1st & 2nd generation and 256MB DRAM in 3rd generation
• Wi-Fi (802.11 b/g)
• Built-in rechargeable, non-removable lithium battery with up to 6 hours of video playback, and up to 36 (30 in 3rd generation) hours of audio playback, times vary.
• Built-in audio speaker (except in 1st generation)
• 3.5 mm audio output jack
• Size: 110×61.8×8 mm (4.3×2.4×0.33 in)
• Weight: 115 grams (4.1 oz)
• Direct iTunes Store access
• Widescreen video
• Included applications:Safari web browser, You Tube client,Mail email client,Google Maps
• Access to App Store (requires iPhone OS 2.0 or later)
• Widgets: Stocks, Weather, Notes
• Access to Starbucks music (available only in selected cities across the United States)

The iPod Touch and the iPhone, a smartphone by Apple Inc., share the same hardware platform and run the same iPhone OS operating system. The iPod Touch lacks some of the iPhone's features and associated apps, such as access to cellular networks, or a built-in speaker and camera (and microphone on older models). As a result, the iPod Touch is slimmer and lighter than the iPhone. Multimedia, which is available as a single "iPod" app on the iPhone, is split into music and movies on the iPod Touch . The 2nd generation iPod Touch has an external volume switch and a built-in speaker like the iPhone. The 2nd generation also comes with the chrome frame seen on the iPhone 3G, making the two almost identical when viewed from the front. However, there are some notable differences, as there is no speaker above the screen, no silent/ringer switch, the back is metal, and the sleep/wake button is on the other side. The 2nd generation also supports audio input when a headphone or earphone with microphone capabilities is plugged into the audio output (headphone) jack. The iPod Touch  2.0 Software Update supportsWPA2 Enterprise with 802.1X authentication.The iPhone OS 3.0 update unlocked Bluetooth capability on the 2nd generation iPod Touch , as the included Wi-Fi chip (Broadcom BCM4325) has Bluetooth support.

The 2nd generation iPod Touch is said to have a yellower cast/tint to the display, as compared to the iPhone or the original iPod Touch .The applications processor inside the 2nd generation iPod Touch runs slightly faster than the processor inside the iPhonee 3G, but slower than the iPhone 3GS. The first generation iPod Touch works with all "Made for iPod" peripherals, but certain changes that Apple made to the 2nd generation iPod Touch prevent some existing peripherals from recharging the updated player. The Google Street View feature added on iPhone firmware version 2.2 is absent from the same version of firmware released on the iPod Touch but is found in the 3.0 update.

Apple has received criticism for its differential treatment of iPhone and iPod Touch owners. Such criticism is primarily targeted towards Apple charging iPod Touch uch owners for major software updates of the iPhone OS that iPhone owners can obtain at no charge as well as excluding certain features from the iPod Touch software that are included in the iPhone .Apple has been reported as saying that they can add features for free to the iPhone because the revenue from it is accounted for on a subscription basis under accounting rules, rather than as a one time payment.

| More...