How We Research
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
If you want a complete, ready-to-use set of true wireless earbuds with a digital battery display and a long-wear fit for side sleepers, choose HHTTXXYY Hd; if you need a soft silicone protective cover and lanyard set specifically for your Moondrop Pudding TWS earbuds, choose FJIASTB Case.
• HHTTXXYY Hd's biggest strength: It's a full TWS earbud package — Bluetooth 5.3, a 13mm polymer diaphragm driver, call noise reduction, and a real-time power display on the charging case.
• HHTTXXYY Hd's biggest trade-off: It's in-ear with rubber tips and voice-only controls, so there's no touch panel and no active noise cancellation you can toggle.
• FJIASTB Case's biggest strength: A shockproof, waterproof soft-silicone shell with an integrated flip cover, plus a keychain and wrist strap in the box.
• FJIASTB Case's biggest trade-off: It is not an earbud at all — it only fits the Moondrop Pudding TWS case, so it's useless with any other model.
• Buy HHTTXXYY Hd if you still need the actual earbuds and want a display that shows remaining power.
• Buy FJIASTB Case if you already own Moondrop Pudding TWS earbuds and just want to protect the case you have.
The HHTTXXYY Hd is the "everything in one box" option here. It's a true wireless in-ear headset running Bluetooth 5.3, which is the current mainstream standard for fast pairing and a stable connection with phones, tablets and laptops. The driver is a 13mm polymer diaphragm dynamic driver with a 20 Hz to 20,000 Hz frequency range — that's full-range coverage on paper, and the larger-than-average diaphragm is the kind of design choice brands use when they want fuller low-end and a bit more presence in the mids. The brand's own pitch talks about "better than CD" sound, which I'd treat as marketing rather than a measured claim, but the hardware spec itself is legitimate.
The feature that stands out most to me is the HD digital display. It shows real-time power on the case, so you're not guessing whether you have enough charge left before a commute or a call. Pair that with call noise reduction, and this is a sensible pick for someone who takes a lot of voice calls in noisy rooms. Controls are voice-based rather than touch, so you're issuing spoken commands instead of tapping a stem — worth knowing if you prefer physical or touch controls.
On fit: the HHTTXXYY Hd uses a half-in-ear, in-ear style with rubber tips, and the brand specifically calls out "long wear not tired ears." For side sleepers, that matters. The best open ear earbuds for side sleepers are the ones that sit flush and don't press into the pillow, and a half-in-ear design with a light, low-profile shell is a much better candidate for that than a bulky over-ear or a deep-canal IEM. I'd still recommend testing it on your own pillow, because ear geometry varies so much — but the design intent points the right way. If you specifically need noise canceling open ear earbuds for side sleepers, note that the HHTTXXYY Hd does call noise reduction, not full active noise cancellation for music playback, so don't expect to mute the world.
Who should skip it: anyone who wants active noise cancellation, touch controls, or an open-ear hook design. Also, if you already own a case cover and just need a shell, this isn't what you're shopping for.
The FJIASTB Case is a different animal entirely — it's an accessory, not a listening device. Specifically, it's a protective cover made for the Moondrop Pudding TWS earbuds case, and the brand is unusually blunt about it: it fits that model and not others, and they ask you to verify your device before buying. That's the single most important thing to know here. If your earbuds aren't Moondrop Pudding TWS, this product can't help you.
What it does well is protection. The material is soft silicone — skin-friendly, waterproof and shockproof — in a dark green with a nature pattern. Silicone is a smart choice for a case cover because it absorbs drops instead of transferring the impact to the plastic underneath, and it doesn't scratch whatever else is in your bag. The integrated design means the flip cover is attached rather than a separate lid, so it won't pop off and get lost when you're opening the case one-handed on a train.
Two practical details I like: you can charge without taking the cover off, which sounds minor until you've owned a case that forces you to peel it back every single day, and the package includes a keychain and a wrist strap alongside the case itself. That combination makes it genuinely travel-friendly — clip it to a bag loop or your keys, or carry it on the wrist strap when you're walking and don't want to dig through pockets. The form factor is listed as a slim fit case, and the dimensions are listed as 0.01 x 0.01 x 0.01 inches, which looks like a placeholder in the listing data rather than a real measurement, so I'd go by the "slim fit" description and the fact that it's molded to one specific model.
Who should skip it: anyone who doesn't own Moondrop Pudding TWS earbuds, and anyone looking for the earbuds themselves. This is purely a shell, strap and clip.
Side-by-Side: Which Should You Choose?
• Best for side sleepers → HHTTXXYY Hd. The half-in-ear, rubber-tip design with a "long wear" fit is the more sleep-friendly shape; the FJIASTB Case has nothing to do with fit.
• Best for battery awareness → HHTTXXYY Hd. The HD digital display shows real-time power, which the FJIASTB Case obviously doesn't.
• Best for calls in noisy places → HHTTXXYY Hd. It lists call noise reduction and voice control.
• Best for protecting earbuds you already own → FJIASTB Case. Shockproof, waterproof silicone with an integrated flip cover.
• Best for carrying on a bag or keys → FJIASTB Case. It ships with a keychain and a wrist strap.
• Best if you want an all-in-one purchase → HHTTXXYY Hd. One box, one product, ready to pair.
• Best value depends on what you own. If you have Moondrop Pudding TWS earbuds and a bare case, the FJIASTB Case is the smarter spend; if you have nothing yet, the HHTTXXYY Hd is the starting point.
In my opinion, most people searching these two names together should buy the HHTTXXYY Hd, because it's the only one of the pair that is an actual pair of earbuds — Bluetooth 5.3, a 13mm polymer driver, a power display and a half-in-ear fit that I'd recommend for side sleepers who want something low-profile against a pillow. I'd only pick the FJIASTB Case if you already own Moondrop Pudding TWS earbuds and your case is currently unprotected. They're not really competitors; they're two different jobs. Check the current price on Amazon before you commit, since that's the one thing that can swing the decision either way.
what is tws earbuds
TWS stands for "true wireless stereo" — earbuds that connect to your phone over Bluetooth with no wire between the left and right earpiece. The HHTTXXYY Hd is a TWS headset with Bluetooth 5.3 and a 20 Hz to 20,000 Hz range.
our Micool Open Ear Headphones vs Relxhome NE20 pickwhat is tws earbuds means
It means the two earbuds are independent and pair separately, rather than being joined by a cable. That's the category the HHTTXXYY Hd belongs to; the FJIASTB Case is only a protective cover for one specific TWS model.
how much is tws earbuds
That depends entirely on the model and the seller, and it changes often. I don't quote numbers here — use the price button on this page to see the current listing for each.
how to tws earbuds
Charge the case, take the earbuds out and put them in pairing mode, then select them in your phone's Bluetooth menu. The HHTTXXYY Hd uses Bluetooth 5.3 for a fast, stable connection, and its digital display shows you the remaining power so you know when to recharge.
As an Amazon Associate I earn from qualifying purchases.
We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon and affiliated sites.
When you buy through links on this page, we may earn a commission from qualifying purchases at no extra cost to you.
Amazon and the Amazon logo are trademarks of Amazon or its affiliates. This site is an independent third-party review and is not affiliated with, endorsed by, or sponsored by Amazon or the product brands mentioned.
See also: iJoy Headphones Over Ear vs Xjahwr Karaoke Machine, Tascam TH-05 vs Behringer Studio Headphones BH60, our Micool Open Ear Headphones vs Relxhome NE20 pick, VOLT PLUS TECH Pro Earbuds vs ciciglow Earbuds