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| Price | Check Prices | $254.86 to $383.99 | $79.95 | Check Prices | Check Prices |
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| Release date | March 28, 2008 | July 01, 2009 | March 28, 2008 | March 28, 2008 | September 15, 2008 |
| The Bottom Line | The Sony NWZ-A820 is the best sounding, best-looking Walkman series yet, and the inclusion of Bluetooth audio makes it a top choice for cable-hating audio enthusiasts. | The X-Series is a superb choice for audiophiles who want a luxury device with an excellent touch-screen interface and plenty of other bells and whistles. | The Sony NWZ-A720 is the best-sounding, best-looking Walkman series yet, and the inclusion of premium earphones adds real value. | The Sony NWZ-A820 is the best sounding, best-looking Walkman series yet, and the inclusion of Bluetooth audio makes it a top choice for cable-hating audio enthusiasts. | Thanks to excellent sound quality, integrated noise-canceling functionality, and several smart music sorting options, the Sony S-Series Walkman is a superb choice for music aficionados. |
| Similar Products | Compare more products | Compare more products | Compare more products | Compare more products | Compare more products |
| Features | |||||
| Dimensions (WxDxH) | 2 in x 0.4 in x 3.7 in | 2.1 in x 0.4 in x 3.9 in | 2 in x 0.4 in x 3.7 in | 2 in x 0.4 in x 3.7 in | 1.7 in x 0.3 in x 3.5 in |
| Software type | Info unavailable | Microsoft Windows Media Player 11 | Info unavailable | Info unavailable | Info unavailable |
| Resolution | 240 x 320 | 432 x 240 | 240 x 320 | 240 x 320 | 240 x 320 |
| Mfr estimated battery life | 36 hour(s) | 33 hour(s) 9 hour(s) | 36 hour(s) | 36 hour(s) | Info unavailable |
| PC interface(s) supported | Bluetooth Hi-Speed USB | USB Wi-Fi | Hi-Speed USB | Bluetooth Hi-Speed USB | USB |
| Flash memory form factor | Integrated | Integrated | Integrated | Integrated | Integrated |
| Flash memory installed | 8 GB | 16 GB | 8 GB | 8 GB | 8 GB |
| Battery technology | Info unavailable | Lithium ion | Info unavailable | Info unavailable | Lithium ion |
| Weight | 2 oz | 3.5 oz | 2 oz | 2 oz | 1.6 oz |
| Full specifications | Full specifications | Full specifications | Full specifications | Full specifications | Full specifications |
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Sony Walkman NWZ-A828K (8GB, black) comparison
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