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We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
If you want to protect the Beats Studio Buds you already own and make them easier to keep track of, choose KOUJAON Case Compatible; if you need a complete, budget-friendly set of wired Lightning earbuds for an iPhone, choose SUPVOL 2.
• KOUJAON Case Compatible — biggest strength: A shock-absorbing silicone shell that fits Beats Studio Buds (2021) and Beats Studio Buds+ (2023) precisely, with a detachable stainless steel five-leaf-clover keychain so your earbuds stop disappearing into the bottom of a bag.
• KOUJAON Case Compatible — biggest trade-off: It is a case only. There is no audio hardware inside, so it does nothing for a buyer who does not already own Beats Studio Buds.
• SUPVOL 2 — biggest strength: A two-pack of in-ear wired earbuds with an inline mic and volume control, connecting over Lightning to a long list of iPhone models, backed by a one-year warranty.
• SUPVOL 2 — biggest trade-off: Wired-only. There is no Bluetooth here, no charging case in the audio sense, and the cable ties you to the phone.
• Who each pick is for: KOUJAON for existing Beats Studio Buds owners who want protection and a fashion accent; SUPVOL 2 for iPhone users who want a spare, plug-and-play wired pair for calls and everyday listening.
The KOUJAON case is a single-purpose product, and it is honest about that. It exists to wrap a pair of Beats Studio Buds (2021) or Beats Studio Buds+ (2023) in soft silicone with precise cutouts, so the charging case underneath stays free of scratches, scuffs and the kind of grime that accumulates in a pocket or a gym bag. The shock-absorbing construction is the real point: silicone flexes on impact, which is exactly what you want when your earbuds get dropped on pavement or rattled around in a backpack.
As for who should skip it: anyone who does not own Beats Studio Buds. This is not a universal case, and the fit is specific to those two generations. It is also worth being clear that this is an accessory for women who like the clover-and-rose-gold look, which KOUJAON itself frames as a gift angle for birthdays, anniversaries, Valentine's Day and Mother's Day. If you want a plain black sleeve with no charm, this is not that product. If you want something your earbuds can be spotted by from across a room, it is.
SUPVOL 2: Who It's For
The SUPVOL 2 is a different category of purchase entirely. This is a two-pack of wired, in-ear earbuds in white, connecting over Lightning and listed as compatible with a broad spread of iPhones — the 14, 13, 12, 11, XR, XS, 8, 7 and SE lines, including Pro Max variants. Each pair has an inline microphone and volume control on the cable, so you can take a call and adjust levels without touching the phone. A user manual is included, and the package counts two items, which is the practical heart of the product: one pair lives in your bag, one stays at your desk or in the car.
Wired is the whole trade-off, and it cuts both ways. You never think about charging, pairing or a battery dying mid-call. You also never walk more than a cable-length from your phone, and the Lightning connector means this is strictly an iPhone product — a modern USB-C iPhone or any Android phone is out of the question. The one-year warranty is a reasonable signal of expected durability for a cable-based accessory, and the model is listed under model number EBGC-NV with SUPVOL as the manufacturer name.
Who should buy it: iPhone owners who want a cheap, dependable spare pair for calls, podcasts and video, or who simply prefer the certainty of a wire. Who should skip it: anyone who has moved to Bluetooth, anyone on USB-C, and anyone expecting noise cancellation in the active sense — the listing describes noise reducing, which is a passive, seal-based effect rather than an electronic feature.
• Best for protecting earbuds you already own → KOUJAON Case Compatible. It is built for Beats Studio Buds (2021) and Beats Studio Buds+ (2023) and nothing else.
• Best for actually listening to audio → SUPVOL 2. It is the only one of the two that contains speakers, a mic and volume control.
• Best for staying findable → KOUJAON Case Compatible. The clover keychain and detachable steel ring are designed around not losing your earbuds.
• Best for iPhone compatibility across many models → SUPVOL 2. The Lightning connection covers a long list of iPhone generations, including Pro Max sizes.
• Best for drop and scratch resistance → KOUJAON Case Compatible. Shock-absorbing silicone with a waterproof rating on the case material.
• Best for never charging anything → SUPVOL 2. Wired means no battery, no pairing, no charging case.
• Best as a gift → KOUJAON Case Compatible. The rose gold finish and clover charm are explicitly positioned for gifting occasions.
• Best if you own neither Beats nor an iPhone → Neither, honestly. These are both narrow-fit products, and buying outside their compatibility list wastes your money.
In my opinion, the right pick depends entirely on which problem you actually have. If you already own Beats Studio Buds and your complaint is scratches, drops or constantly losing the case, I would buy the KOUJAON Case Compatible — it solves a real, daily annoyance, and the keychain does more work than the specification suggests. If you need sound, not protection, I would buy the SUPVOL 2 as a spare wired pair for an iPhone; the two-pack and inline controls make it a sensible backup. Do not buy either one as a substitute for the other. They sit at opposite ends of the same habit: one protects the earbuds you have, the other gives you a pair to plug in. Check the current price on Amazon before deciding, since the value math changes with what you already own.
FAQ
Yes. The manufacturer lists compatibility with both Beats Studio Buds (2021) and Beats Studio Buds+ (2023), with precise cutouts for the charging case. It is not a universal case, so check your model before buying.
The listing specifies a Lightning connection and compatibility with iPhone 14, 13, 12, 11, XR, XS, 8, 7 and SE models. Lightning-only means USB-C iPhones and Android phones are not covered.
No. The description says noise reducing, which refers to the passive seal of the in-ear tips blocking outside sound. There is no active noise cancellation circuitry described.
They are not comparable purchases. The KOUJAON is an accessory for earbuds you already own; the SUPVOL 2 is a two-pack of working earbuds. Decide which need you have first, then check the current price on Amazon for that product.
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