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List of iPod touches
There are currently four generations of the iPod touch. A comparison of them is below:
| Feature | iPod touch 1G | iPod touch 2G | iPod touch 3G | iPod touch 4G |
|---|---|---|---|---|
| Picture | 142px | 133px | 129px | |
| Dimensions (mm) | 110.0 x 61.8 x 8.0 | 110.0 x 61.8 x 8.5 | 111.0 x 58.9 x 7.2 | |
| Dimensions (in.) | 4.3 x 2.4 x 0.31 | 4.3 x 2.4 x 0.33 | 4.4 x 2.3 x 0.28 | |
| Weight | 120g / 4.20 oz | 115g / 4.05 oz | 101g / 3.56 oz | |
| Capacity (GB) | 8/16/32 | 8/16/32 | 32/64 | 8/32/64 |
| Processor Speed (MHz) | 400 (iOS 1.1 and 1.1.1) 412 (iOS 1.1.2 and later) |
533 | 620 | 1024 |
| RAM (MB) | 128 | 128 | 256 | 256 |
| Buttons | sleep, home | sleep, home, volume up/down | ||
| Battery Life (Music, hours) | 22 | 36 30 ("MC" model) |
30 | 40 |
| Battery Life (Video, hours) | 5 | 6 | 6 | 7 |
| Initial Firmware | 1.1 (3A100a) | 2.1.1 (5F138) 3.1.1 (7C145) ("MC" model) |
3.1.1 (7C145) | 4.1 (8B117) |
| Display | 320x480 LCD at 163 ppi | 640x960 LCD at 326 ppi (Retina display) | ||
| Built-in speaker | No | Yes | Yes | Yes |
| Nike+ Support | No | Yes | Yes | Yes |
| Light Sensor | Yes | Yes | Yes | Yes |
| Bluetooth 2.1 | No | Yes (as of iOS 3.0) | Yes | Yes |
| Voice Controls | No | No | Yes | Yes |
| Camera | No | No | No | Yes - Front and Back |
| FaceTime | No | No | No | Yes |
| Microphone | No | Accessory purchase | Yes; On included headphone cable | Yes |
