Oppo Enco Free 4

Name: Oppo Enco Free 4
Brand: Oppo
SKU: 1251

Manufacturer: Oppo

The Oppo Enco Free 4 are true wireless in-ear earbuds that cover a solid range of everyday listening needs without unnecessary extras. Weighing just 9.4 g per earbud, they sit comfortably in the ear and come rated IP55 for resistance against dust and water splashes, making them reasonably well-suited for outdoor and active use. A travel bag is included in the box, and the earbuds support ambient sound mode alongside a built-in translator function, which broadens their practical appeal beyond straightforward music playback.

On the technical side, the Oppo Enco Free 4 use an 11 mm driver unit covering a frequency range of 20 Hz to 20,000 Hz, paired with active noise cancellation and passive noise isolation for cleaner listening in noisier environments. Six microphones with noise-canceling support handle calls and voice input. Connectivity runs over Bluetooth 5.4 with a stated range of 40 m, and the earbuds support the LDHC codec alongside AAC. Battery life reaches 11 hours per charge, or around 6 hours with ANC active, while the charging case extends total playback to 34 hours; fast charging via USB-C brings the earbuds from empty to ready in roughly 51 minutes.

Pros

IP55 rating provides protection against both dust and water splashes, making them suitable for outdoor and active use
Six noise-canceling microphones support cleaner voice pickup during calls
Both active noise cancellation and passive noise isolation are available for reducing ambient sound
The charging case extends total playback to 34 hours, and a full charge takes under an hour thanks to fast charging support
A built-in translator function adds practical utility beyond standard audio playback
A travel bag is included in the box, offering a ready-to-use storage solution

Cons

Wireless charging is not supported, requiring a wired connection via USB-C every time
Battery life drops noticeably from 11 hours to 6 hours when ANC is active
In-ear detection is absent, meaning music will not pause automatically when the earbuds are removed
Spatial audio, Dolby Atmos, and Dirac Virtuo are not supported, limiting immersive listening options
Fast pairing and NFC pairing are not available, which may slow down the initial connection process on compatible devices

Who is this for?

These earbuds suit users who want a capable daily driver for commuting, travel, or outdoor use, thanks to their IP55 dust and water resistance and a combined battery life of 34 hours. The presence of both active noise cancellation and passive isolation makes them a reasonable fit for those who need to block out busy environments, while the built-in translator adds particular value for frequent travelers or those who regularly communicate across language barriers. With six noise-canceling microphones and headset functionality, they also work well for people who take a high volume of calls throughout the day.

Who is this NOT for?

Users who prioritize high-fidelity audio formats will find this model limiting, as it lacks support for LDAC, aptX in any of its variants, spatial audio, Dolby Atmos, and Dirac Virtuo — making it a poor fit for audiophiles seeking advanced sound processing. Those who rely on in-ear detection for seamless playback management will also find its absence frustrating, since audio will not pause automatically when the earbuds are removed. Additionally, users who expect wireless charging or fast Bluetooth pairing via NFC as standard conveniences may find the charging and connection experience less streamlined than they would like.

Design:

Fit	In-ear
Ingress Protection (IP) rating	IP55
water resistance	Water resistant
weight	9.4 g
has no wires or cables	✓
are neckband earbuds	✕
wingtips included	✕
has RGB lighting	✕
has stereo speakers	✓
has UV light	✕
Has a display	✕

The Oppo Enco Free 4 adopt a true wireless, in-ear design with no cables or neckband, and each earbud weighs just 9.4 g. They carry an IP55 rating, meaning they are protected against dust ingress and low-pressure water jets from any direction, making them water resistant for everyday use. Stereo speakers are present, while features such as wingtips, RGB lighting, a display, and a UV light are not included in the design.

Sound quality:

has active noise cancellation (ANC)	✓
has passive noise reduction	✓
driver unit size	11 mm
lowest frequency	20 Hz
highest frequency	20000 Hz
supports spatial audio	✕
has Dolby Atmos	✕
has Dirac Virtuo	✕
has a neodymium magnet	✕

The Oppo Enco Free 4 use an 11 mm driver unit and cover a frequency range of 20 Hz to 20,000 Hz, handling the full span of human hearing. Both active noise cancellation (ANC) and passive noise reduction are supported, giving listeners two layers of isolation from ambient sound. Spatial audio, Dolby Atmos, Dirac Virtuo, and a neodymium magnet are not part of the specification.

Power:

Battery life	11 hours
Battery life of charging case	34 hours
Battery life (ANC)	6 hours
charge time	0.85 hours
battery power	62 mAh
battery power (charging case)	530mAh
has wireless charging	✕
Has a solar power battery	✕
has a battery level indicator	✓
has a rechargeable battery	✓

Each earbud holds a 62 mAh rechargeable battery delivering up to 11 hours of playback, which drops to 6 hours when ANC is active. The charging case adds a 530 mAh reserve that extends total listening time to 34 hours combined, and a full charge of the earbuds takes approximately 51 minutes. A battery level indicator is included, while wireless charging and a solar power battery are not supported.

Connectivity:

has fast pairing	✕
Has USB Type-C	✓
Bluetooth version	5.4
has LDAC	✕
has LDHC	✓
has Bluetooth LE Audio	✕
has aptX Adaptive	✕
has aptX Low Latency	✕
has aptX HD	✕
has aptX	✕
has aptX Lossless	✕
has aptX Voice	✕
has Auracast	✕
maximum Bluetooth range	40 m
supports Bluetooth pairing using NFC	✕
Can be used wirelessly	✓
has AAC	✓

The Oppo Enco Free 4 connect wirelessly via Bluetooth 5.4 with a maximum range of 40 m, and the charging case uses USB Type-C. Supported audio codecs include LDHC and AAC, while LDAC, aptX in all its variants (including aptX Adaptive, aptX HD, aptX Low Latency, aptX Lossless, and aptX Voice), and Bluetooth LE Audio are not supported. Fast pairing, NFC pairing, and Auracast are likewise absent from the feature set.

Features:

has ambient sound mode	✓
has in/on-ear detection	✕
Supports fast charging	✓
can read notifications	✕
Has a built-in translator	✓
has a mute function	✓
can be used as a headset	✓
control panel placed on a device	✓
Has voice prompts	✓
travel bag is included	✓
Has an in-line control panel	✕
Has a temperature sensor	✕
Has a built-in camera remote control function	✕

The Oppo Enco Free 4 include a practical set of features for daily use, among them ambient sound mode, a built-in translator, a mute function, voice prompts, and fast charging support. They can function as a headset for calls, and controls are handled through a panel placed directly on the earbuds rather than an in-line remote. A travel bag is included in the box, adding a small convenience for users on the move. In-ear detection, notification reading, a temperature sensor, and a camera remote shutter function are not available on this model.

Microphone:

number of microphones	6
has a noise-canceling microphone	✓

The Oppo Enco Free 4 are equipped with 6 microphones in total, and all include noise-canceling capability to help reduce unwanted background sound during calls and voice input.

Final Verdict

The Oppo Enco Free 4 present a well-rounded set of specifications for users who want reliable everyday wireless earbuds with practical extras. The combination of IP55 protection, a 34-hour total battery life with fast charging, and a six-microphone noise-canceling array gives them genuine appeal for commuters, travelers, and call-heavy users alike. The built-in translator and ambient sound mode further broaden their real-world utility beyond straightforward audio playback. Where they fall short is in audio codec depth and the absence of features like in-ear detection and wireless charging — areas that matter more to discerning listeners or those deeply embedded in smart device ecosystems. Overall, the Oppo Enco Free 4 are a practical, feature-conscious option for users who prioritize durability, call performance, and extended battery endurance over audiophile-grade sound processing.