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| Price | $69.95 | $38.99 to $55.99 | $43.99 to $49.99 | $39.99 to $64.99 | $39.99 to $49.99 |
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| Release date | August 30, 2007 | September 15, 2008 | September 01, 2009 | March 30, 2009 | February 01, 2009 |
| The Bottom Line | If you're looking for an affordable, utilitarian MP3 player to take on the road or to the gym, the Sony NWZ-B100F is a solid solution with awesome audio quality. | The entry-level Sony B-Series Walkman is a solid choice for the gym thanks to its ultracompact design, quick charge function, and integrated FM tuner--but beware the eye strain. | The SanDisk Sansa Clip+ is an excellent successor to the line, offering a fitness-friendly design with a built-in belt-clip, a simple interface, solid sound quality, and plenty of handy features--all for an ultralow price. It's an unbeatable value. | The Sony W-Series Walkman is a great option for active users who want an all-in-one music device to use while working out. | In the world of budget MP3 players, the Philips GoGear Spark is a diamond in the rough, offering an attractive balance of features, style, and usability. |
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| Features | |||||
| Dimensions (WxDxH) | Info unavailable | 3.5 in x 0.6 in x 1 in | 1.4 in x 0.6 in x 2.2 in | 7.4 in | 1.7 in x 5.7 in x 5.9 in |
| Resolution | Info unavailable | Info unavailable | Info unavailable | Info unavailable | 128 x 128 |
| Digital player signal-to-noise ratio | Info unavailable | Info unavailable | Info unavailable | Info unavailable | 80 dB |
| Software type | Drivers & Utilities | Info unavailable | Drivers & Utilities | Info unavailable | Drivers & Utilities |
| Mfr estimated battery life | 12 hour(s) | 16 hour(s) | 15 hour(s) | 12 hour(s) | Info unavailable |
| PC interface(s) supported | Hi-Speed USB | Hi-Speed USB | Hi-Speed USB | USB | Hi-Speed USB |
| Flash memory form factor | Integrated | Integrated | Integrated | Integrated | Integrated |
| Flash memory installed | 2 GB | 2 GB | 4 GB | 2 GB | 2 GB |
| Battery technology | Info unavailable | Lithium ion | Info unavailable | Lithium ion | Info unavailable |
| Weight | Info unavailable | Info unavailable | 0.8 oz | 1.3 oz | Info unavailable |
| Digital storage media capacity | Info unavailable | Info unavailable | Info unavailable | Info unavailable | 2 GB |
| Full specifications | Full specifications | Full specifications | Full specifications | Full specifications | Full specifications |
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