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Reviews around feature (3.22 of 5)
Jaybird X4 Wireless Sport Headphones (Black Metallic/Flash)
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The accompanying Jaybird phone app (I used the iPhone version) allows for custom EQ profiles - a very welcome feature
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The sound quality is great and having the ability to adjust the audio through their app is a really cool feature
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Sound great, if you are not a frequent in-ear user it can hurt a
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