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What power supply adapter is suggested to charge the JM21?
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Instructions for Settings->Audio menu of JM21
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The indication of sampling rates for JM21
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Instructions for Settings->Global menu for JM21
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How to change the language on the JM21? Lyrics display, screenshot of the JM21
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JM21 indicator light description
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Does DK1Pro support JM21?
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How to use the FiiO Link function in JM21?
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How to use the AirPlay function in JM21?
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How to use the DLNA function in JM21?