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We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-10-07 · 7 min read · Independent comparison
• NVAHVA Single Earbud — biggest strength: A 4 g in-ear bud with a 10-hour battery, Bluetooth 5.4 with ENC noise reduction, and multi-point pairing to two devices at once.
• NVAHVA Single Earbud — biggest trade-off: It is one ear only, uses sound isolation rather than true noise cancellation, and carries just an IPX5 rating, so heavy rain or submersion will damage it.
• RETRADEKING Over-Ear FM Headphones — biggest strength: Over-ear 40 mm drivers with a 32 Ω impedance, active noise cancellation, and a dual Bluetooth plus FM radio mode with a bundled USB transmitter.
• RETRADEKING Over-Ear FM Headphones — biggest trade-off: No microphone and no mic input at all, so it cannot be used for calls, and at 300 g it is far heavier than the bud.
• Who each pick is for: The NVAHVA is for the person on calls all day who wants one ear free; the RETRADEKING is for the person watching TV, movies or gaming who wants immersive sound.
The NVAHVA Single Earbud is built around one idea: keep one ear open. It sits in a single ear in an ergonomic "L" shape, weighs just 4 g, and ships with three ear tip sizes so you can fit it properly. Because it only occupies one ear, you stay aware of traffic, coworkers, a doorbell, or a kid in the next room. That is the entire reason this category exists, and it is why the bud is marketed for driving, trucking, office work and commuting.
On the technical side, it runs Bluetooth 5.4 with an integrated ENC chip to cut background noise on calls, drives a 16 mm balanced armature driver across a 20 Hz to 20,000 Hz range, and holds a 10-hour battery on a 2-hour charge. It pairs to two devices at once via multi-point, so you can be connected to your laptop and your phone simultaneously and jump between them. One multi-function button handles answer/end, play/pause, track skip, redial and voice assistant. There are no blinking lights during use, which is a genuinely useful detail in an open office or a client meeting.
For video calls specifically, this is the shape that makes sense. One bud in, one ear listening for your own voice and the room, a mic that is positioned for speech, and a battery that outlasts a full workday of meetings. The IPX5 rating means sweat and light rain are fine, but it is not a swimming or heavy-rain device. There is also a one-year replacement policy for defective units rather than a standard return.
RETRADEKING Over-Ear FM Headphones: Who It's For
The RETRADEKING Over-Ear FM Headphones are the opposite philosophy. These are full over-ear headphones with 40 mm drivers, a 32 Ω impedance, and active noise cancellation, tuned for deep bass and a wide, immersive soundstage. The ear cups are padded with softer material and the headband is multi-level adjustable, so the fit can be dialed in for long sessions. The retractable, lightweight ergonomic frame is designed for extended wear even though the unit itself weighs 300 g.
The unusual part is the dual-mode wireless. It runs Bluetooth 5.3 with a 10–15 m range, and it also runs FM radio from 88 to 108 MHz with a transmit frequency of 88.1 MHz. The bundled USB transmitter lets you connect to a TV, computer or audio device that has no Bluetooth, provided that device has a 3.5 mm or RCA audio output. That is the TV-watching use case this product is clearly built around: no audio delay, no pairing hassle on an older television, and a 10-hour battery on a 1-hour charge.
Now the honest part. There is no microphone. The spec sheet lists it explicitly as a wireless headset with no mic. That means this is not a video call device. If you join a call wearing these, your voice will not reach anyone. It is a listening-only product for movies, TV series, gaming and music. The 6-month warranty is also shorter than the NVAHVA's one-year replacement policy, and the frequency response figure on the sheet is listed as an FM range rather than a conventional audio range, so I would treat the audio claims as marketing framing rather than a measured spec.
Who should skip it: anyone who needs to talk, anyone who wants a pocketable device, and anyone who already has Bluetooth on their TV and doesn't need the FM or USB transmitter path. Also skip it if you want something lightweight — 300 g on your head for hours is a real consideration.
• Best for video calls → NVAHVA Single Earbud. It has a built-in mic with ENC noise reduction and multi-point pairing to a phone and laptop at once. The RETRADEKING has no microphone at all.
• Best for TV and movie watching → RETRADEKING Over-Ear FM Headphones. The FM mode plus USB transmitter is made for TVs and audio gear without Bluetooth, and the over-ear design delivers the bass and immersion you want for film.
• Best for all-day wear → NVAHVA Single Earbud. At 4 g with one ear free, it disappears. The RETRADEKING weighs 300 g.
• Best for battery life → NVAHVA Single Earbud. A 10-hour rating on a 2-hour charge versus an 8-hour rating on a 1-hour charge, and the bud wins on total listening time per charge.
• Best for music quality → RETRADEKING Over-Ear FM Headphones. 40 mm drivers and a 32 Ω impedance give it a real advantage over a single 16 mm balanced armature bud.
• Best for noise control → RETRADEKING Over-Ear FM Headphones. It lists active noise cancellation; the NVAHVA relies on passive sound isolation.
• Best for situational awareness → NVAHVA Single Earbud. One ear stays open, which is why it suits driving, warehouses and shared offices.
• Best for a kids headset for video calls → NVAHVA Single Earbud. The single-bud format is lighter, lower profile, and the light weight makes it an easier fit for smaller heads during remote school or family calls.
• Best waterproof neckband headphones for video calls → neither, strictly. The NVAHVA carries IPX5 sweat and splash resistance, which is the closest either product gets to water protection; the RETRADEKING lists no water rating at all.
For the use case I framed this around — video calls — I would buy the NVAHVA Single Earbud. It has the microphone, the multi-point pairing, the longer battery, and the one-ear-open design that makes it practical in an office, a truck cab or a home workspace. In my opinion the RETRADEKING is the better product if your priority is watching TV and films with deep bass and you never need to speak into it. If you need both, they are complementary rather than competing, and that is the honest answer here. Check the current price on Amazon before deciding, since your budget will shape which of the two makes more sense as a first purchase.
FAQ
how do non ear headphones work
how to wear in ear headphones
The NVAHVA Single Earbud goes into either the left or right ear with one of the three included ear tip sizes, angled along the ear canal using its "L" shaped body. Pick the tip size that seals without pressure. A proper seal is what gives you the full 20 Hz to 20,000 Hz range and the sound isolation it relies on.
what are non in ear headphones called
They are usually called over-ear, on-ear or open-ear headphones, depending on how they rest on your head. The RETRADEKING model is an over-ear headphone. The NVAHVA Single Earbud, by contrast, is an in-ear mono earpiece, which is the category people mean when they ask about a single bud rather than a pair.
what are the best open ear headphones
That depends entirely on your use case rather than on any single winner. For calls and awareness, a single in-ear bud like the NVAHVA keeps one ear completely free. For immersive TV and music listening with deep bass, an over-ear model like the RETRADEKING is the more suitable design. Match the format to the job.
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