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iRiver
B20 (2GB)
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Cowon
iAudio U3 (2GB model)
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Size, mm 80,9 × 49,5 × 16,3 31.5 × 72 × 18
Weight, grams 74,8 32,5
Available colors White, black White, black
Warranty, years 12 1
Supported Operating Systems Windows Windows, Mac OS, Linux
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Battery life, hours 27 20
Battery recharge time, hours N/A 3
Battery type(s) Li-ion Li-ion
Storage capacity 2 GB 2 GB
Storage type(s) Built-in Flash Drive, Mini Secure Digital Built-in Flash Drive
Display 2.4" TFT LCD 1.2" TFT LCD
Display pixel size 320 × 240 px 160 × 128 px
Display colors 262144 262144
Display illumination Yes Yes
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Audio support Yes Yes
Audio format(s) AAC, MP3, OGG, ASF, WMA MP3, WAV, FLAC, WMA
Video support Yes Yes
Video format(s) DIVX, MPEG4, ASF, H.264 OGG, XVID, MPEG4, ASF
Photo support Yes Yes
Photo format(s) JPG JPG, BMP, PNG
Microphone Yes Yes
Radio FM FM
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USB 2.0 2.0
Bluetooth No No
Firewire No No
TV-out No No