We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-10-08 · 7 min read · Independent comparison
If you want a TV audio transmitter that also future-proofs your setup for Auracast hearing aids, choose Avantree Audikast 3; if you need open-ear earbuds that double as a wearable accessory and a genuinely good gift for teens, choose REAL YOUNG H700.
That's the short version. The longer version matters because these two products barely compete for the same job — one sits next to your TV, the other sits on your ear. But if you arrived here searching for aptx adaptive headphones and ended up comparing these two, you're probably trying to figure out which one actually solves your problem. Let me break it down honestly.
• Avantree Audikast 3 — biggest strength: A Qualcomm-powered Bluetooth 5.4 transmitter with Auracast support, built to stream TV audio to Bluetooth headphones and to modern Auracast-enabled hearing aids. Firmware upgradable, so it can gain features over time.
• Avantree Audikast 3 — biggest trade-off: It's not headphones. It's a box you connect to your TV via Optical or AUX. If you don't already own Bluetooth headphones or Auracast hearing aids, this purchase does nothing on its own.
• REAL YOUNG H700 — biggest strength: A complete listening product out of the box — open-ear fit, dual drivers with Qualcomm QCC3091 tech, up to 40 hours of total playtime, IPX7 water resistance, and a jewelry-inspired design that reads as a fashion piece first.
• REAL YOUNG H700 — biggest trade-off: Open-ear means you hear your surroundings, which is a feature for commuters and a compromise for anyone chasing isolation. There's no headphone jack, and the fit depends on the G-shaped hook suiting your ear.
• Who each is for: Avantree Audikast 3 → someone with a TV, a hearing aid, or a pair of headphones they want to use privately. REAL YOUNG H700 → someone who wants stylish open-ear earbuds in the box, no extra gear required.
The Audikast 3 is a transmitter, and I want to be blunt about that because a lot of shoppers skim past it. You connect it to your TV through Optical or AUX, and it sends that audio wirelessly to Bluetooth headphones from brands like AirPods or Bose. That's the core trick: private TV listening without cranking the volume or waking anyone up. If you've ever watched a late-night match with the sound turned down to a whisper, you already understand the appeal.
Who should buy it? Anyone with a TV and a set of Bluetooth headphones who wants quiet, private listening. Anyone with Auracast-compatible hearing aids who wants TV audio routed directly into them. And anyone who values the firmware-upgradable angle — Avantree pushes updates through its official support page, which means the box can improve rather than stagnate.
Who should skip it? If you want something you can unbox and wear, this isn't it. You need headphones or hearing aids to complete the chain. And if your TV only offers connections you can't use here, check your ports before buying.
REAL YOUNG H700: Who It's For
The H700 is the opposite kind of product — everything you need is in the box. It's an open-ear earbud with a dragon-wing silhouette, CNC-engraved texture, and a premium aluminum finish, and the design language is deliberately jewelry-first. REAL YOUNG leans into that: it's positioned as a wearable accessory you'd actually want to be seen wearing, and the styling has picked up Gold Awards from the French Design Award and MUSE Design Awards. I'm not going to pretend that's why you buy earbuds, but for a gift, aesthetics carry real weight.
On the audio side, it uses dual drivers paired with Qualcomm QCC3091 technology, with a 12 mm driver, a 20 Hz–20 kHz frequency range, 16 ohm impedance, and 106 dB sensitivity. The tuning is described as rich detail with powerful bass and a balanced profile for music, calls, gaming, and everyday listening. Two microphones with noise reduction handle calls, and there's environmental noise cancellation on board.
The practical story is comfort and endurance. Each earbud weighs 10.5 g, and the flexible G-shaped ear hook follows the natural curve of your ear, so it stays put during walking, commuting, yoga, and light workouts. Battery life runs up to 40 hours total with the charging case, and a full charge takes about 2 hours. IPX7 waterproofing covers sweat, rain, and splashes. Bluetooth 5.4 gives you a 10-meter range, and controls are touch-based.
Who should buy it? Teens and young adults who want open-ear listening that keeps them aware of traffic and surroundings. Anyone who treats earbuds as part of an outfit. And gift shoppers — this is squarely aimed at that use case, with a refined charging case and a look that reads as a present rather than a gadget.
Who should skip it? If you want noise isolation, open-ear is the wrong category by definition. And if you prefer a traditional in-ear seal or a wired option, there's no jack here.
• Best for private TV listening → Avantree Audikast 3. It exists to move TV audio to headphones or hearing aids.
• Best for Auracast-ready hearing aid users → Avantree Audikast 3. It's explicitly built for aids like GN Danalogic Extend, Jabra Enhance Pro 20, and ReSound Nexia.
• Best for a complete, out-of-the-box listening product → REAL YOUNG H700. Transmitter versus earbuds isn't a fair fight on this point.
• Best for battery life → REAL YOUNG H700. Up to 40 hours of total playtime with a 2-hour charge time.
• Best for situational awareness and open-ear listening → REAL YOUNG H700. The open design keeps you connected to your surroundings.
• Best for water and sweat resistance → REAL YOUNG H700. IPX7 protection against sweat, rain, and splashes.
• Best for a stylish gift → REAL YOUNG H700. Jewelry-inspired design, aluminum finish, and a presentation-ready case.
• Best for future-proofing an existing audio setup → Avantree Audikast 3. Bluetooth 5.4, Auracast, Qualcomm internals, and firmware upgrades.
If I were buying for myself and my goal was better TV audio, I'd take the Avantree Audikast 3 — it does a specific job, does it with Auracast and firmware updates behind it, and it's the only one of the two that touches your TV at all. But if I'm buying for teens, or buying a gift that has to land on the first try, I'd pick the REAL YOUNG H700 without hesitating. It's complete, it's comfortable at 10.5 g per bud, it survives sweat and rain, and it looks like something someone actually wants to wear. Those open-ear headphones gift for teens searches exist for a reason — this is the product that answers them. Check the current price on Amazon before you commit, since that's the one variable I can't speak to here.
FAQ
what is aptx adaptive headphones
They can be, and the H700 is built with that in mind — 10.5 g per earbud, a flexible G-shaped hook, IPX7 protection, and up to 40 hours of total playtime. The main caveat is that open-ear design lets outside sound in, which some teens love for safety and others find underwhelming for loud environments.
The H700 is designed for walking, commuting, yoga, and light workouts, with IPX7 waterproofing against sweat, rain, and splashes. "Light workouts" is the operative phrase — it's not marketed for intense training.
Yes, that's exactly the scenario it's built for. It connects to your TV over Optical or AUX and streams to headphones from brands like AirPods or Bose, and the firmware-upgradable design means it can gain improvements over time.
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