We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-10-06 · 6 min read · Independent comparison
If you want open-ear awareness, a secure ear-hook fit and a huge 50-hour total battery reserve for movies, choose Tulbeys Open Ear Headphones; if you need tiny, silicone-wrapped buds that disappear into small ears and stay comfortable through a full movie on your side, choose eleror Invisible Mini Earbuds.
• Tulbeys biggest strength: an ear-hook open-ear design with 10g buds, IPX5 sweat resistance and up to 8 hours per charge (50 hours total with the case) — built for movement and long sessions.
• Tulbeys biggest trade-off: the ear-hook shape is bulkier and more visible than a mini bud, so it won't suit side-sleeping or anyone who wants their audio to be discreet.
• eleror biggest strength: a genuinely tiny 14mm, 3g bud wrapped in soft silicone, which sits inside the ear and stays low-profile for sleep, work and quiet listening.
• eleror biggest trade-off: shorter battery (6 hours per charge, 30 hours total) and an in-ear fit that blocks more of your surroundings than an open-ear design.
• Pick Tulbeys if you want situational awareness, a locked-in fit for running or cycling, and the longer total playtime.
• Pick eleror if you want small-ear comfort, a nearly invisible bud, and something you can wear lying down.
The Tulbeys set is an ear-hook open-ear model, and that single design choice drives everything else. Each bud weighs about 10g and hangs on a hook rather than plugging into your canal, so there's no in-ear pressure and you keep hearing traffic, gym noise or a partner talking to you. The enclosure is polycarbonate, the drivers are listed as bone-conduction type with a 20Hz–20,000Hz range and 30-ohm impedance, and Bluetooth 5.4 holds a connection out to roughly 30 feet.
For an active buyer, the practical story is sweat and stability. IPX5 resistance covers intense workouts and rain, and the hook keeps the bud from shifting when you run or cycle. Battery is the other headline: up to 8 hours on a single charge, and the compact case pushes total playtime to about 50 hours. For a long movie marathon on a laptop or tablet, that reserve means you're not babysitting a charger between films. The USB-C crowd will appreciate a modern charging case rather than a fiddly micro-USB one — worth confirming what's in the box, but the design language points that way.
Who should skip it? If you sleep on your side, or you want earbuds nobody can see, the hook shape works against you. It's also the wrong pick if you want maximum isolation — open-ear is the opposite of that by design.
eleror Invisible Mini Earbuds: Who It's For
The eleror X9 is the opposite philosophy: get as small as possible. The body is 14mm across — the brand compares it to something smaller than a penny — and each bud weighs just 3g. It's wrapped entirely in soft silicone and sits in the concha of your ear, which is why the fit advice is align, seat and rotate the tail until it locks. For people with small ear canals who find normal buds painful or loose, that's a real advantage, and the included S/M/L tips let you dial in the seal.
That in-ear silicone seal does two things. It physically reduces surrounding noise, which the brand frames as natural noise isolation, and it makes the X9 a genuine sleep option — low profile enough to wear lying down. The audio side is a 6mm dynamic driver with 16-ohm impedance, 90dB sensitivity and a 22,000Hz frequency response, tuned for balanced everyday sound rather than chest-thumping bass. ENC handles calls, and the touch controls cover play/pause, volume and call answering with taps and a long press to reject.
Battery is the compromise. You get 6 hours per charge and up to 30 hours total from the case, with roughly a 2-hour charge time. The sheet also lists a 1-year warranty, which is a reasonable safety net on a small, fiddly product. Bluetooth here is listed as 6.0 in the feature copy and 5.4 in the spec table, with a 10-metre (about 33-foot) range — either way, modern and stable.
Skip the eleror if you want to hear your surroundings, if you need marathon battery, or if you sweat heavily during workouts — the soft silicone shell is comfortable, but open-ear hooks are the more natural fit for heavy gym use. And if you want a visible, physical control surface, these tiny buds mostly rely on taps, which some people find fussy.
• Best for movies at home or on a laptop → Tulbeys Open Ear Headphones, thanks to the 50-hour total reserve and the 20Hz–20,000Hz range that reaches deeper into bass territory.
• Best for sleep and side-sleeping → eleror Invisible Mini Earbuds — a 14mm, 3g silicone bud is simply less to lie on.
• Best for running, cycling and gym work → Tulbeys, because IPX5 sweat resistance plus the ear hook is a purpose-built active combination.
• Best for small ears and all-day low-pressure wear → eleror, whose whole design brief is tiny, soft and pressure-free.
• Best for total battery life → Tulbeys (8 hours per charge, ~50 hours with the case versus 6 and ~30).
• Best for staying aware of your surroundings → Tulbeys, since open-ear lets ambient sound in by design.
• Best for quiet, private listening in an office or on a plane → eleror, where the silicone seal naturally reduces outside noise.
• Best for a discreet look → eleror, no contest — an invisible mini bud versus a visible ear hook.
For movies specifically, I'd buy the Tulbeys Open Ear Headphones. The 50-hour total battery means I can get through several films without thinking about charging, the 20Hz low end suits the deep bass moments in action and sci-fi soundtracks, and the open design keeps me from feeling sealed off for hours at a time. The ear-hook fit also means I can pause for a stretch or a walk and not worry about a bud popping loose. I'd only switch to the eleror Invisible Mini Earbuds if I watched on a phone in bed and wanted something I could fall asleep in.
The eleror Invisible Mini Earbuds, in my opinion. At 14mm and 3g with a full silicone shell, they're built for lying down, while the Tulbeys ear hook is more likely to press against a pillow.
Yes. Tulbeys lists up to 8 hours per charge and about 50 hours total with the case. The eleror X9 lists 6 hours per charge and up to 30 hours total, with roughly a 2-hour charge time.
The eleror X9. Its in-ear silicone seal naturally reduces surrounding sound. The Tulbeys are open-ear by design, so they deliberately let ambient noise in — great for safety, less great for quiet focus.
You can, and the compact fit stays put for walking and commuting. That said, the Tulbeys' IPX5 sweat resistance and ear-hook retention are the more purpose-built choice for heavy workouts and rain.
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