If you want replacement ear tips that help compatible earbuds stay secure while running, choose AZLA SednaEarfit Crystal; if you need translation earbuds with a screen-equipped case for travel conversations, choose Rulbovs NE70. These products serve very different purposes, so the better pick comes down to whether you want to improve earbuds you already own or add translation features to a separate wireless-earbud set.
For running, AZLA is the more relevant choice: its grippy silicone tips are designed to help compatible earbuds stay put. Rulbovs brings more onboard functions, but its translation-focused design is a different proposition.
• AZLA SednaEarfit Crystal: A grippy, hypoallergenic silicone replacement tip intended to improve fit and passive sound isolation; the trade-off is that compatibility depends on your earbuds and their nozzle.
• Rulbovs NE70: Translation earbuds with a touchscreen charging case, translation modes, and stated battery figures; the trade-off is that those extra functions do not make them replacement tips for another pair.
• For running: AZLA is the more direct fit if your compatible earbuds need tips designed to hold securely during activity.
• For travel conversations: Rulbovs is the feature-rich option, with language translation and controls on the case.
• Choose AZLA if you want to retain compatible earbuds and change their fit; choose Rulbovs if you want translation features built into a separate earbud system.
AZLA SednaEarfit Crystal is a set of replacement earbud tips, not a complete pair of earbuds. Its key appeal is the material: the tips use German liquid silicone rubber described as hypoallergenic, with a naturally grippy surface. That combination is aimed at people whose compatible earbuds tend to shift during workouts, commuting, or other everyday movement. For running, the grip is the most relevant detail. It is a design feature intended to help maintain a secure fit, not a guarantee that every earbud will stay in place for every runner.
A more stable seal can also help with passive sound isolation. AZLA describes the tips as improving that isolation while preserving the earbuds’ original sound signature. In practical terms, the design is for someone who wants a closer-fitting tip without intentionally changing the earbuds’ character. Multiple size options are available, which matters because the seal and comfort depend on choosing a size that suits your ears. The listed size names include ML, MS, SS, and SSS.
Compatibility needs a careful check before buying. The product is described as compatible with Beats Powerbeats Pro and Powerbeats Pro 2, among other wireless earbuds, and the information also identifies Galaxy Buds 2, Buds, and Buds+ as compatible. The short 4 mm core is intended to fit a range of true-wireless earbuds, but the tips are explicitly not compatible with Galaxy Buds Pro, Galaxy Buds Live, or AirPods Pro. Case fit is also product-specific: the listing says compatible Beats tips maintain charging-case compatibility, but that should not be assumed for every earbud model.
Who should skip it: Skip AZLA if you need complete earbuds, translation functions, or replacement tips for a model listed as incompatible.
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We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-10-18 · 7 min read · Independent comparison
Rulbovs NE70: Who It's For
The product information states support for 165 languages, with offline translation packs available for eight major languages after downloading them. It also describes nine translation modes for different conversation situations, including face-to-face use, group settings, and image-based text translation. These are useful distinctions for someone considering translation as the main reason to buy. They also make the NE70 a poor direct substitute for a simple running accessory: the product’s central purpose is language assistance, and the supplied information does not describe a running-specific fit feature.
Who should skip it: Skip the NE70 if your main goal is to improve the fit of existing earbuds for running, rather than use translation features.
• Best for a running-focused fit change → AZLA SednaEarfit Crystal. Its grippy silicone surface is specifically described as helping earbuds stay secure during workouts.
• Best for translation while traveling → Rulbovs NE70. Its stated features include translation support, multiple modes, and a touchscreen charging case.
• Best for keeping compatible earbuds → AZLA. These are replacement tips, so the idea is to update the fit of earbuds you already own rather than replace them with a new earbud system.
• Best for checking controls without reaching for a phone → Rulbovs. The 1.3-inch case touchscreen is designed for language selection, mode changes, and battery checks.
• Best for multiple tip-size options → AZLA. The product lists several sizes, which may help buyers match the tips to their ear shape.
• Best for stated long total battery use → Rulbovs. Its information gives a total of more than 60 hours with the case, while also distinguishing between translation and music playback runtimes.
• Best if sound isolation is a priority → AZLA. The tips are designed to create a seal for passive isolation while preserving the earbuds’ original sound.
• Best if you want a USB-C-charged translation case → Rulbovs. The case’s stated full charging time is 1.5 hours over USB-C.
Before choosing AZLA, identify your exact earbud model and verify that it is compatible. Replacement tips are only useful if their connection fits the earbud nozzle, and the product information names some compatible models while explicitly ruling out others. Consider the available sizes, too. A grippy material cannot make up for a size that does not fit your ear, and a secure seal is personal. If your concern is that earbuds shift during exercise, the tip’s intended role is relevant, but it does not establish that every earbud-and-ear combination will behave the same way.
For the NE70, decide whether you will actually use translation. Its touchscreen case, offline language packs, and nine modes are the reasons to consider it; if you only want ordinary earbuds for a run, those features may not answer your main need. Also keep the battery figures in context: the listed continuous translation time is 6 hours, while music playback is stated at 8 hours. The case is described as providing four full recharges, but the listed total depends on use and should not be treated as a promise of identical runtime in every situation.
Neither product is a direct, like-for-like alternative to the other. AZLA changes the fit of compatible earbuds. Rulbovs supplies a translation-oriented earbud system with its own case. If you are comparing them because you want something for running, focus first on your existing earbuds and whether they accept AZLA’s tips. If you are choosing for travel communication, focus instead on whether the NE70’s translation features match the way you expect to converse.
I would choose AZLA SednaEarfit Crystal for running, provided my earbuds were on its compatibility list and the available size fit me. Its grippy silicone and seal-focused design address the practical issue of keeping compatible earbuds secure during movement. I would choose the Rulbovs NE70 only if translation and case-based controls were the priority. For the specific goal of running, AZLA is my more relevant pick.
No. AZLA SednaEarfit Crystal is a set of replacement earbud tips for compatible earbuds. Rulbovs NE70 is a wireless earbud system with translation features and a touchscreen charging case.
Its silicone has a naturally grippy surface intended to help compatible earbuds stay in place during workouts and other activity. The product information does not guarantee the fit for every person or earbud, so check compatibility and size carefully.
The product information states that it supports 165 languages, with offline packs for eight major languages available after downloading. The other listed languages should not be assumed to work offline.
AZLA is a set of tips and has no battery. Rulbovs states 6 hours of continuous translation or 8 hours of music playback, plus four full case recharges and more than 60 hours total.
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