Built by FiiO for its own MP3 player, the FiiO SK-M21C protective case has cutouts that line up precisely with the player's ports, buttons and screen. It guards against scratches, scuffs and impacts for anyone who carries a player every day in a gym bag, jacket pocket or backpack.
Who the FiiO SK-M21C is for
Gym-bag carry: Tossed in a gym bag, the player stays shielded from scratches, scuffs and impacts.
Pocket and backpack commuters: Daily carry in a jacket pocket or backpack wears on a bare finish; the case takes that wear instead.
Owners who want FiiO's own fit: Made by FiiO for its player, it keeps every control and port fully usable.
Skip it if: you want a single case to cover several devices; the SK-M21C is precisely fitted to FiiO's own MP3 player.
FiiO SK-M21C key specs
Type: Protective case, official FiiO accessory
Cutouts: Lined up with the player's ports, buttons and screen
Protection: Scratches, scuffs, impacts
Controls: All controls and ports stay fully usable
Colors: Gold, Blue, Black
TonePier carries only genuine, brand-new FiiO accessories. Free shipping and a 45-day return window make it painless if the fit is not what you expected.
FiiO SK-M21C vs similar options
vs FiiO SK-M21: FiiO's SK-M21 is also an official fitted case that keeps ports, buttons and controls accessible, in Brown, Black or Blue, and it costs less; check which FiiO player each case is cut for.
vs Shanling C3 Max: Shanling's C3 Max takes a different approach: a pressure-resistant hard storage case sized for the M8T, with room for dongles, cables and tips, rather than a case the player wears.
Yes. Every unit we sell is genuine and brand-new, shipped in its original packaging, and backed by our 1-year TonePier warranty and 45-day returns.
Where does my order ship from, and how long does it take?
Every order ships from our warehouse in China, with full tracking, and most orders ship within 3 business days. Shipping is free on every order; most US orders arrive within 7–15 business days and most orders to other countries within 7–20 business days — see our shipping policy for details.
What if it isn't for me?
You get 45 days to decide. Keep the packaging, keep it in like-new condition, and send it back for a refund. Ear tips unsealed for hygiene reasons are fine — we expect you to actually listen.
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