HiFiMAN Edition S Owner's Manual page 8

Edition S
If you have any concerns with your product: please contact us to explain
the issue in detail. If a return/refund is required, a RA# will be issued.
Return shipping to HIFIMAN or authorized service facility is done at the
owner's expense.
For any further information or questions, please contact your authorized
HIFIMAN dealer. Or email us directly at customerservice@HIFIMAN.com.
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Owner's Guide