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Updated: 2026-09-17 · 6 min read · Independent comparison
If you want a dedicated TV audio transmitter that streams your television privately to headphones, earbuds or Auracast-compatible hearing aids, choose Avantree Audikast 4; if you need open-ear earbuds for running, gym sessions and staying aware of traffic while you listen, choose LVYEZHI Open-Ear Headphones.
• Avantree Audikast 4 — biggest trade-off: It is not a pair of headphones. It only works with TVs that have Optical (TOSLINK) or 3.5 mm AUX output — HDMI-only TVs won't work, soundbar passthrough isn't supported, and in Classic Bluetooth mode only one device can connect at a time.
• LVYEZHI Open-Ear Headphones — biggest strength: True wireless open-ear earbuds with a 14.2mm dynamic driver, Bluetooth 6.0, ENC call noise reduction, IPX5 water resistance and up to 60 hours of total playtime with the swivel charging case.
• LVYEZHI Open-Ear Headphones — biggest trade-off: Open-ear design means no isolation — you hear the world around you on purpose. There's no wired jack, no Auracast, and no TV transmitter function.
• Who each is for: Avantree Audikast 4 is for TV watchers, late-night viewers and hearing-aid users who want private television audio. LVYEZHI is for runners, gym-goers and commuters who want music while staying aware.
The Avantree Audikast 4 is a small black transmitter — roughly 2.7 by 2.9 by 2.6 inches — and it does one job extremely well: it takes the audio coming out of your TV and sends it wirelessly to something on your head. You plug it into your TV's Optical (TOSLINK) or 3.5 mm AUX output, and from there it broadcasts in one of two modes. Auracast mode reaches Auracast headphones, Auracast speakers and Auracast-compatible hearing aids. Classic Bluetooth mode reaches ordinary Bluetooth headphones and speakers, but only one device at a time.
In my opinion, this is a device for a specific buyer: someone with a TV that has Optical or AUX out, and either a pair of regular Bluetooth headphones or Auracast-compatible hearing aids. Hearing-aid users should be careful here — the sheet is explicit that the hearing aids must support Auracast broadcast audio, and you should confirm your model against the compatible list before buying. Skip it if your TV is HDMI-only, if you run audio through a soundbar passthrough, or if you were hoping to wirelessly share one TV stream with several regular Bluetooth headphones at once — Classic Bluetooth mode won't do that.
LVYEZHI Open-Ear Headphones: Who It's For
The LVYEZHI Open-Ear Headphones are a completely different animal: a set of true wireless open-ear earbuds built for movement and awareness. Each bud sits outside your ear canal rather than sealing it, so ambient sound — a car approaching, a cyclist calling out, a colleague saying your name — comes through while your music plays. The 14.2mm dynamic driver handles the audio, and there's a built-in microphone with ENC noise reduction for calls.
The spec sheet points to a lifestyle product. Bluetooth 6.0 gives a claimed stable range up to 15 meters, and the touch panel on each bud handles playback and call controls with a tap. Battery life is quoted at 10–13 hours per charge, with the rotating charging case extending total playtime to 60 hours — the kind of number that covers a week of workouts or a long trip without hunting for a cable. IPX5 water resistance means sweat and light rain aren't a problem. Impedance is 32 ohm, and the driver type is listed as bone conduction, which fits the open-ear, sound-through-vibration approach these buds take.
Who should buy it? Runners, walkers, gym regulars, cyclists on quiet paths, and anyone who finds in-ear buds uncomfortable after an hour. The swivel case is also a distinctive touch — it doubles as something to fidget with, which LVYEZHI leans into as a small stress-relief feature. Who should skip it? Anyone who wants deep isolation on a plane or a noisy train. Passive noise cancellation on an open-ear design is exactly what it sounds like: not much. And if you're buying to fix a TV audio problem, this isn't the product — there's no transmitter, no Auracast and no wired jack.
• Best for TV listening at your own volume → Avantree Audikast 4. It's purpose-built to take Optical or AUX audio off your TV and send it privately to headphones or Auracast hearing aids.
• Best for Auracast and hearing-aid users → Avantree Audikast 4. Auracast broadcast support is the headline feature, provided your hearing aids are on the compatible list.
• Best for workouts, running and outdoor awareness → LVYEZHI Open-Ear Headphones. The open-ear fit keeps you alert to traffic and surroundings.
• Best for all-day battery → LVYEZHI Open-Ear Headphones. 10–13 hours per charge plus a rotating case that brings total playtime up to 60 hours.
• Best for call quality on the move → LVYEZHI Open-Ear Headphones. ENC call noise reduction and a built-in mic are there for phone calls; the Avantree unit is a transmitter, not a headset.
• Best for multi-listener sharing → Avantree Audikast 4, but only via Auracast. Classic Bluetooth mode is limited to one device; Auracast is the path to sharing.
• Best for sweat and light rain → LVYEZHI Open-Ear Headphones. IPX5 water resistance is a claim the Avantree transmitter doesn't make — it's a stationary, USB-C powered box.
• Best for setup simplicity → LVYEZHI Open-Ear Headphones. Pair over Bluetooth and go. The Avantree requires checking your TV's outputs first, and HDMI-only TVs are a dead end.
If I were buying for myself, I'd pick based on the problem in front of me rather than trying to split the difference. For a TV that keeps the household awake, I'd buy the Avantree Audikast 4 — its Auracast and Classic Bluetooth modes, aptX Adaptive/HD support and firmware-upgradable design make it the more capable long-term purchase, as long as my TV has Optical or AUX out. For running, the gym and everyday listening outdoors, I'd buy the LVYEZHI Open-Ear Headphones instead: Bluetooth 6.0, IPX5, a 14.2mm driver and up to 60 hours of total playtime cover the realities of training. In my opinion these two don't really compete — they solve different problems, and the right answer depends on which problem is yours.
No. Avantree states the TV must have Optical (TOSLINK) or 3.5 mm AUX output, and HDMI-only TVs won't work. Soundbar passthrough setups aren't supported either, so check your TV's connections before you buy.
Not in Classic Bluetooth mode — that's limited to one device at a time. For multiple listeners you'd need Auracast-compatible headphones or receivers, which is the mode built for sharing.
No, and they're not meant to. The open-ear design deliberately lets ambient sound in so you stay aware of traffic and your surroundings. Noise control is listed as passive only.
The LVYEZHI Open-Ear Headphones. IPX5 water resistance, a snug open-ear fit, touch controls and up to 60 hours of total playtime suit training far better than a stationary TV transmitter. Check the current price on Amazon before deciding.
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