We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-10-03 · 8 min read · Independent comparison
If you want to turn a non-smart TV or PC into a Bluetooth-ready audio source with true no-lip-sync playback, choose Gentechvvybuy Optical; if you need a true wireless gaming earbud set with a wired 2.4GHz dongle and a rated sub-20ms latency, choose Globvanx V2.
• Gentechvvybuy Optical — biggest strength: three digital/analog inputs (Optical TOSLINK, Coaxial, 3.5mm AUX) plus aptX Low Latency / FastStream support over Bluetooth 5.0, so it can sync audio to headphones on TVs that were never Bluetooth-capable.
• Gentechvvybuy Optical — biggest trade-off: it is not headphones at all. It's a transmitter/receiver box with no battery, so you must keep it plugged into a power adapter, and you need to supply your own Bluetooth headphones or speaker.
• Globvanx V2 — biggest strength: a rated 20ms audio latency path via the 2.4GHz USB-C dongle, which is the low-latency route for gaming and VR on PS5, PS4, PC, Switch and Meta Quest headsets.
• Globvanx V2 — biggest trade-off: the dongle is USB-C, and connecting to USB-A ports on a PC, PS5, PS4 or Switch dock requires a USB-C to USB-A adapter that isn't included.
• Who the Gentechvvybuy Optical is for: someone who wants to watch TV or movies privately through their own Bluetooth headphones without disturbing anyone.
• Who the Globvanx V2 is for: someone who wants low-latency wireless audio for games, VR and calls, and doesn't want to fuss with a separate transmitter.
The Gentechvvybuy Optical (model TX9) is a Bluetooth 5.0 audio transmitter and receiver built around one job: getting sound out of a non-smart or non-Bluetooth TV or PC and into a pair of Bluetooth headphones. It handles three input types — Optical TOSLINK (PCM digital audio), Coaxial, and 3.5mm AUX — which is the useful part. Older TVs, cable boxes and desktop PCs tend to have one or two of those outputs but no Bluetooth radio at all, and this box bridges that gap.
The low-latency angle is where it earns its keep. The transmitter supports aptX Low Latency and FastStream, which is the codec pair that minimizes the audio-video gap you'd otherwise see as lip-sync drift. One honest caveat straight from the specs: to actually get that ultra-low latency, your headphones also have to support aptX Low Latency. If your headphones only do standard SBC, the box still works, but you shouldn't expect the same tight sync. The unit has a power button, volume buttons, a TF card slot, an input indicator light, and touch controls, and it's wall-mountable if you want it out of sight. It runs on USB-C power with no battery, so it lives where you plug it in.
Setup is about as simple as this category gets: power it on via USB-C, plug into the Optical, AUX or Coaxial output on your TV, turn on your Bluetooth headphones and let it pair. Two practical notes worth knowing before you buy. First, plug it into a proper wall power adapter rather than a laptop or a cheap USB port — the manufacturer notes that non-grounded USB power can introduce ground-loop noise. Second, if you're using the optical connection, you'll need to switch your TV's audio setting to the optical output and set it to PCM/Stereo, not surround.
Buy it if you want to watch movies and shows at your own volume through your existing Bluetooth headphones, and your TV or PC isn't Bluetooth-capable. Skip it if you're looking for headphones themselves, or if your headphones don't support aptX Low Latency and tight sync is your top priority. The manufacturer also doesn't recommend it for streaming live music performance, since that use case is more latency-sensitive.
The Globvanx V2 is a set of true wireless in-ear gaming earbuds with a very specific trick: a 2.4GHz USB-C dongle that creates a dedicated low-latency link, rated at under 20ms. That's the number that matters here. Standard Bluetooth audio typically carries more delay than that, which is why a dongle-based path is the usual answer for gaming, VR and anything where you'd notice the gap between what you see and what you hear.
The hardware backs up the pitch. You get Bluetooth 5.4 for phone and headset pairing, and the 2.4GHz dongle for PS5, PS4, PC, Quest, and Switch. Inside are 11mm dynamic drivers covering 20Hz–20,000Hz at 32 ohms, which is the kind of spec set that aims for full-range sound rather than thin game audio. There's an ENC (Environmental Noise Cancellation) microphone for voice chat, so teammates hear you more clearly over background noise. The earbuds are in-ear with multiple sizes of silicone eartips in the box, IPX5 water resistance for sweat and light rain, and a charging case rated for about 6 hours of use with a 2-hour charge time.
Two things to plan around. The dongle is USB-C, so if you're plugging into a USB-A port — a desktop PC, the PS5, PS4, or a Switch dock in TV mode — you'll need a USB-C to USB-A adapter, and it isn't included. And do the small prep step Globvanx recommends: peel off the protective sticker on the earbuds and wipe the charging contacts before the first charge, or you may think the case is broken when it isn't.
Buy it if you game or use VR and want the low-latency wireless route solved out of the box, with a mic for chat and a comfortable in-ear fit. Skip it if you need a transmitter to feed audio into headphones you already own, or if your devices only have USB-A and you don't want to buy an adapter. It also comes with a lifetime warranty, which is a nice bit of peace of mind.
Side-by-Side: Which Should You Choose?
• Best for low-latency gaming and VR → Globvanx V2. The 2.4GHz USB-C dongle is the dedicated low-latency path, rated under 20ms.
• Best for connecting an old non-Bluetooth TV → Gentechvvybuy Optical. Three input types (Optical, Coaxial, AUX) cover the outputs older TVs actually have.
• Best when you already own good headphones → Gentechvvybuy Optical. You supply the headphones; the box just makes them wireless for TV and PC audio.
• Best all-in-one solution → Globvanx V2. It's earbuds, mic, dongle and case in one package — no separate transmitter to buy or power.
• Best for PC and Switch with USB-A ports → depends. Both need adaptation: Gentechvvybuy Optical needs the right cable into your TV's output, while Globvanx V2 needs a USB-C to USB-A adapter for the dongle.
• Best for voice chat while gaming → Globvanx V2. The built-in ENC microphone is made for talking to teammates.
• Best for long sessions and workouts → Globvanx V2. Multiple eartip sizes, IPX5 water resistance, and a 6-hour case rating suit movement and extended play.
In my opinion, these two aren't really competitors — they solve different problems, and your pick should follow the problem you actually have. If you want to watch TV through your own Bluetooth headphones without waking the house, I'd buy the Gentechvvybuy Optical; its three inputs and aptX Low Latency support are exactly what that job needs. If you want wireless audio for gaming, VR and calls with a rated sub-20ms latency and a mic built in, I'd buy the Globvanx V2 instead. Buy the Gentechvvybuy Optical to fix an old TV; buy the Globvanx V2 to win a firefight.
how to make bluetooth headphones low latency
Two things have to line up: a transmitter that supports a low-latency codec, and headphones that support the same codec. The Gentechvvybuy Optical supports aptX Low Latency and FastStream, but the manufacturer notes your headphones must also support aptX Low Latency to get the full effect. If either side lacks it, you fall back to standard Bluetooth timing.
do bluetooth headphones have latency
Yes — standard Bluetooth audio carries some delay, which is why lip-sync drift and audio lag are common complaints. That's exactly the gap the Globvanx V2 targets with its 2.4GHz USB-C dongle, rated at under 20ms. On the transmitter side, the Gentechvvybuy Optical aims to reduce lag using aptX Low Latency or FastStream, provided the paired headphones support it.
how to get low latency on bluetooth headphones
Use a dedicated low-latency path rather than plain Bluetooth. With the Gentechvvybuy Optical, connect your TV via Optical, Coaxial or AUX, and pair headphones that support aptX Low Latency. With the Globvanx V2, plug the 2.4GHz USB-C dongle into your PS5, PS4, PC, Quest or Switch and skip Bluetooth for gaming entirely. Remember the V2 dongle needs a USB-C to USB-A adapter for USB-A ports, which isn't included.
how to get low latency on bluetooth headphones windows 11
On Windows 11 the source device and the headphones both have to support a low-latency codec for it to engage. The Globvanx V2 sidesteps the codec question by using its 2.4GHz USB-C dongle, which is rated under 20ms — but a PC with only USB-A ports needs a USB-C to USB-A adapter. If you're routing a Windows PC's audio into headphones you already own, the Gentechvvybuy Optical connects via USB-C for power and Optical, Coaxial or AUX for audio, and again relies on aptX Low Latency on the headphone side.
If either option matches what you need, check the current price on Amazon before you commit, since that's the one detail that shifts over time.
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