If you want replacement tips that help compatible earbuds stay secure for running, choose AZLA SednaEarfit Crystal; if you need translation earbuds with a touchscreen case and extended playback claims, choose Rulbovs NE70. For running specifically, AZLA is the more relevant option: its grippy silicone tips are designed to improve fit during activity. The NE70 is built around translation and travel features, not a sport-focused fit.
• AZLA SednaEarfit Crystal strength: Grippy silicone tips can help compatible earbuds stay put during workouts; trade-off: these are replacement tips, not earbuds.
• Rulbovs NE70 strength: Translation features, a 1.3-inch touchscreen charging case, and stated music playback of up to 8 hours; trade-off: its feature set centers on translation and travel rather than running.
• Choose AZLA if you already own compatible earbuds and want to change their fit or passive sound isolation.
• Choose Rulbovs if you want wireless earbuds with translation functions and controls on the case.
• For a foldable headset for running or a “best gaming headphones for running” search: neither product is a foldable headset or gaming-headphone model; AZLA is only an ear-tip accessory, while NE70 is a translation-earbud set.
AZLA SednaEarfit Crystal is a set of replacement earbud tips, not a complete pair of headphones. Its main appeal is the material: the tips use German liquid silicone rubber, described as hypoallergenic, with a naturally grippy surface intended to help earbuds stay in place during workouts and everyday movement. For running, that gives AZLA a clear use-case advantage over a product designed around translation.
The tips are also intended to form an acoustic seal that improves passive sound isolation without changing the earbuds’ original sound signature. Multiple sizes are available, so the idea is to find a fit that suits your ears rather than settling for the tips supplied with your earbuds. AZLA also describes the material as durable and resistant to tearing.
Compatibility is the key limitation. These tips fit only compatible earbuds, and the product information names several models while also listing exclusions. They are described as compatible with Beats Powerbeats Pro and Powerbeats Pro 2, among other earbuds, but they are not compatible with Galaxy Buds Pro, Galaxy Buds Live, or AirPods Pro. Check your exact earbud model before choosing them; a secure material cannot help if the tip does not fit the nozzle or charging case.
I’d choose AZLA if I already owned compatible earbuds and wanted a different fit for exercise, commuting, or longer listening sessions. I’d skip it if I needed a complete audio device, Bluetooth connectivity, a charging case, or translation features. It is a fit accessory, not a standalone listening solution.
Rulbovs NE70 is a wireless earbud set built around real-time translation. Its charging case has a 1.3-inch color touchscreen for selecting languages, changing translation modes, and checking battery status. The feature list describes support for 165 languages, with offline translation packs available for eight major languages. Those functions make it more relevant to travel and conversation across language barriers than to improving how a running earbud fits.
How We Research
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-10-20 · 7 min read · Independent comparison
That distinction matters if you are buying for exercise. The NE70 information identifies it as an on-ear product and lists app and touch controls, but does not describe a grippy replacement-tip design or a sport-focused fit. Nor does it identify the earbuds as a foldable headset or gaming headphones. If your main need is reliable fit while running, that missing focus is a reason to look elsewhere.
I’d consider NE70 if translation tools and a screen on the charging case are the features I actually need. I would not choose it just because I wanted a USB-C charging open-ear earbud for running: the available product details do not identify it as open-ear, and USB-C charging applies to its case. For a running purchase, its translation feature set is a detour from the main problem.
• Best fit-focused choice for running → AZLA SednaEarfit Crystal. Its grippy silicone is specifically described as helping compatible earbuds stay secure during workouts.
• Best if you need complete wireless earbuds → Rulbovs NE70. AZLA supplies tips only; it does not provide earbuds, a case, or Bluetooth.
• Best for changing passive sound isolation → AZLA SednaEarfit Crystal. Its seal is intended to improve isolation while keeping the original sound signature of the earbuds.
• Best for translation while traveling → Rulbovs NE70. The touchscreen case and language features are its central strengths.
• Best for choosing among tip sizes → AZLA SednaEarfit Crystal. Multiple sizes are available, but compatibility with your particular earbuds must be checked.
• Best for USB-C case charging → Rulbovs NE70. The product information says its case charges by USB-C and gives a 1.5-hour full-charge time.
• Best if battery figures are a priority → Rulbovs NE70. Its stated figures are 6 hours of continuous translation, 8 hours of music playback at 50% volume, and four full case recharges.
• Best match for a foldable headset for running or gaming headphones for running → neither. Neither product is described as a foldable headset or gaming headphone; AZLA is the more relevant running-related option only when you already have compatible earbuds.
These two products solve different problems, so the comparison is less about choosing between two versions of the same thing and more about identifying what you need. AZLA changes the contact point between your ears and compatible earbuds. NE70 adds translation functions and a touchscreen case to a complete wireless-earbud setup.
That difference is especially important for runners. A tip accessory can be useful if your current earbuds fit poorly, but it cannot replace the earbuds themselves. NE70 does provide earbuds, yet its listed advantages are language support, controls, and playback time—not a specialized running fit. If your run is the deciding use case, don’t mistake a more feature-packed product for a better fit to that need.
The safest way to decide is to start with what you already own and what you want to improve. If your compatible earbuds work well but need a more secure-feeling tip, AZLA addresses that specific gap. If you want translation tools in a wireless-earbud package, NE70 is the more direct fit. Neither should be treated as a direct substitute for the other.
My Verdict
For running, I’d choose AZLA SednaEarfit Crystal, provided my earbuds are compatible. Its grippy silicone and workout-oriented fit claims address the practical issue that matters most here: keeping earbuds in place. NE70 offers more built-in features, but they focus on translation and travel rather than running. I would buy NE70 only if those translation functions were my priority.
No. AZLA SednaEarfit Crystal is a set of replacement tips for compatible earbuds. Rulbovs NE70 is a complete wireless-earbud set with a charging case.
AZLA is the more relevant choice for running because its grippy silicone tips are intended to help compatible earbuds stay secure during workouts. Check compatibility with your exact earbud model before choosing the tips.
The product information says the charging case uses USB-C and lists a 1.5-hour full-charge time. It does not describe the earbuds as open-ear running earbuds, so USB-C charging alone should not be taken as evidence of a sport-focused design.
Choose Rulbovs NE70 if you want translation functions, a touchscreen case, and the listed language support. AZLA’s role is to change the fit and seal of compatible earbuds; it does not provide translation or a complete audio device.
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