EarFun Air Pro 4 Plus VS Oppo Enco Free 4

In terms of design, the EarFun Air Pro 4 Plus and the Oppo Enco Free 4 are virtually identical across every measured dimension. Both adopt an in-ear fit, go fully wireless with no cables or neckband, carry an IP55 ingress protection rating, and offer stereo audio — with no RGB lighting, UV sanitization, or displays on either side.

The IP55 rating is worth noting for both: it means each earbud is protected against low-pressure water jets from any direction and against dust ingress sufficient for most real-world use — sweat during workouts, light rain, or splashes are all handled confidently. This is a solid mid-tier protection level, though neither reaches the higher IP57 or IP68 standards seen on more rugged alternatives.

Given the complete spec-for-spec parity in this category, the Design group is a tie. Neither product holds any measurable edge here; a buyer's decision will need to hinge entirely on other spec groups such as audio performance, battery life, or feature set.

Both earbuds share the same frequency response range of 20 Hz to 20 kHz — the full extent of human hearing — and each features both active and passive noise cancellation, meaning neither holds an advantage on paper in terms of noise isolation capability or tonal coverage.

The one measurable difference lies in driver size: the Oppo Enco Free 4 uses an 11 mm driver versus the 10 mm unit in the EarFun Air Pro 4 Plus. A larger driver can, in principle, move more air and produce more authoritative low-end response, but a 1 mm difference is marginal and real-world impact depends heavily on tuning, housing acoustics, and driver quality — none of which are captured here. It is a potential edge for the Enco Free 4, but a modest one that should not be treated as definitive.

Neither model supports spatial audio, Dolby Atmos, or Dirac Virtuo, so users seeking an immersive or cinema-like listening experience will find both options equally limited in that regard. On balance, this group is nearly tied, with the Oppo Enco Free 4 holding a very slight theoretical edge due to its larger driver — though the practical difference is unlikely to be dramatic.

Battery endurance is where the EarFun Air Pro 4 Plus pulls ahead convincingly. It offers 12 hours of playback per charge versus 11 hours for the Oppo Enco Free 4 — a modest gap on its own — but the combined case capacity tells a starker story: 54 hours total for the EarFun against 45 hours for the Oppo. For frequent travelers or users who charge infrequently, that extra buffer is meaningful over the course of a week.

The ANC stamina gap is more pronounced. With noise cancellation active, the EarFun holds up for 8 hours compared to just 6 hours on the Enco Free 4 — a 33% difference that could matter on a long-haul flight or an extended workday. The Oppo partially compensates with a significantly faster charge time of roughly 51 minutes versus 1.5 hours for the EarFun, which is a real practical advantage for users who need a quick top-up before heading out.

The EarFun also supports wireless charging, a convenience feature the Oppo lacks entirely. Weighing everything together, the EarFun Air Pro 4 Plus holds a clear edge in this category — superior total endurance, better ANC runtime, and wireless charging — though the Oppo's faster wired charging keeps it from being a clean sweep.

Connectivity is where these two products diverge most sharply. The EarFun Air Pro 4 Plus runs on Bluetooth 6 — the latest generation — and backs it up with an exceptional codec lineup: LDAC, aptX Adaptive, and aptX Lossless are all present, alongside Bluetooth LE Audio and Auracast. For audiophiles or users with high-resolution audio libraries, this stack is genuinely impressive, enabling near-lossless wireless transmission and future-proofing the earbuds for next-generation audio sharing scenarios. Fast pairing further smooths the day-to-day experience.

The Oppo Enco Free 4 operates on Bluetooth 5.4 and supports LDHC — a high-quality codec common in Oppo and OnePlus ecosystems — but lacks LDAC, aptX Adaptive, LE Audio, and Auracast entirely. For users outside the Oppo/OnePlus ecosystem, LDHC offers limited compatibility. The Enco Free 4 does claim a significantly wider Bluetooth range of 40 m versus the EarFun's 10 m, which could be useful in open spaces where the source device stays stationary, though in typical use cases the difference rarely materializes.

The EarFun Air Pro 4 Plus wins this category decisively. Its newer Bluetooth version, richer codec support, LE Audio capability, and fast pairing collectively represent a substantially more versatile and future-ready connectivity package — the Oppo's range advantage is real but insufficient to offset those deficits.

Across the features category, these two earbuds are remarkably well-matched. Both offer ambient sound mode, fast charging, a built-in translator, mute function, voice prompts, on-device controls, and even a travel bag — a checklist that covers the vast majority of what most users would look for in a modern premium wireless earbud.

The only functional difference is in/on-ear detection, which the EarFun Air Pro 4 Plus includes and the Oppo Enco Free 4 does not. This feature automatically pauses playback when an earbud is removed from the ear and resumes when reinserted — a quality-of-life convenience that reduces friction in everyday use, particularly for users who frequently take calls or have brief conversations throughout the day.

It is a slim margin, but the EarFun Air Pro 4 Plus edges ahead in this group purely on the strength of in-ear detection. For users who value seamless, automatic playback management, that single omission on the Oppo side is a tangible daily inconvenience. All other features being equal, the EarFun holds a narrow but clear advantage here.

On paper, both earbuds are perfectly matched in this category: each features 6 microphones and noise-canceling mic technology. A 6-mic array is a strong configuration for consumer earbuds, typically enabling more sophisticated beamforming and wind noise suppression than the 2- or 4-mic setups found on more budget-oriented options — meaning call quality and voice pickup should be competitive on both devices.

With no differentiating data points available between the two, this group is a clear tie. Users prioritizing call clarity or voice assistant performance cannot use the microphone specs alone to distinguish one product from the other.