Disclosure: I’d like to thank EarFun for providing me with the Air Pro 4+ for this review. All thoughts and opinions are my own, and EarFun had no say or input on the contents of this review.

The EarFun Air Pro 4+ has redefined expectations for sub-$100 wireless earbuds. At $99.99 USD (frequently discounted to ~$75), these earbuds deliver a hybrid dual-driver design, Bluetooth 6.0, premium codec support including aptX Lossless and LDAC, and up to 54 hours of total battery life—specifications that rival earbuds costing two to three times as much. Launched in October 2025 as an upgrade to the already impressive Air Pro 4, this model adds a balanced armature driver for improved treble clarity and introduces EarFun’s proprietary NSAA acoustic architecture. Given the dual drivers, LDAC/aptX Lossless support, multipoint Bluetooth, and a fully featured companion app (all rare at this price point), the Air Pro 4+ offers essentially everything you would want in TWS earbuds. Can the performance and overall result live up to the specification, though? Let’s get into the review and find out.

• EarFun Air Pro 4+
• Set of XS, S, M, L eartips, and an extra set of the M eartips
• USB-C to USB-A charging cable
• Manual

The EarFun Air Pro 4+ follows a familiar stem-style form factor reminiscent of Apple’s AirPods Pro. Construction relies on matte black plastic with glossy accents on the inner surface, creating a more premium look and feel despite the affordable price. Each earbud is very light (about 5 grams each) and tapers into replaceable silicone tips. EarFun provides five sizes of tips (XS/S/M/L/XL); these tips have an oval cross-section, which I found very easy to seat securely. With a proper seal, the earbuds stay snug even during lots of movement.

A capacitive touch panel occupies the upper stem area of each earbud, positioned to minimize accidental activation during adjustment. This is essentially the same design as the Air Pro 4, which is a good thing, as it works very well.

Water and dust resistance earns an IP55 rating, upgraded from IPX5 on the previous model. This protects against low-pressure water jets and dust ingress, making the Air Pro 4+ suitable for workouts, running in light rain, or poolside use.

The charging case is compact and pocket-friendly. It has a front-opening clamshell design with a magnetic lid that has a satisfying click when closing, though opening it one-handed can be slightly awkward since much of the case’s front is the lid. On the bottom front is a small status LED that can be seen even when the case is closed. Inside, the buds sit upright and latch magnetically, making it very easy to take them out as well as insert. The case incorporates a USB-C port on the bottom and also supports Qi wireless charging for added convenience. Also on the bottom of the case is a small button used to initiate pairing, as well as for factory resets.

EarFun’s EarFun Audio app (iOS/Android) provides an unusually rich feature set. On launch, it displays each earbud’s battery level and lets you toggle between ANC, Transparency, and off modes at a glance. The app includes a full 10-band graphic equalizer with dozens of presets (Rock, Jazz, etc.), plus a “My Sound Profile” hearing test to auto-generate a custom EQ curve. Every touch-control action is fully remappable via the app: for example, users can choose which earbud plays/pauses, next track, volume up/down, or voice assistant, with independent settings for single/double/triple taps.

Beyond sound tuning, the EarFun app unlocks almost every advanced setting: it can switch the ANC type (ear-adaptive vs environment-adaptive vs manual vs wind mode), toggle the low-latency Game Mode, and manage multipoint device pairings (select which two devices the buds connect to). It also offers a Find-My-Earbuds function (makes a beep to locate missing buds) and even allows choosing between the left/right microphones or both for calls.

It also allows you to switch between the aptX codec suite and LDAC, which requires the earbuds to reboot. Here are some screenshots from the Android version of the app:

The EarFun Air Pro 4+ uses the Qualcomm QCC3091 chipset with Bluetooth 6.0 support, alongside an industry-leading codec lineup:

• SBC
• AAC
• aptX, aptX Adaptive, aptX Lossless
• LDAC
• LC3

Connection stability proved very reliable in my testing. I experienced zero connection issues across multiple devices, and the multipoint connectivity allows seamless switching between two simultaneously paired devices—pause music on your laptop, answer a call on your phone, etc. Google Fast Pair also simplifies Android pairing to opening the case near your device, as well as accessing controls quickly.

Latency in videos and gaming is very good. The Ear Pro 4+ includes a dedicated Game Mode that reduces latency to around 50ms (the default is ~200ms). In my tests, the synchronization of audio with action (e.g., streaming YouTube or even playing games like Battlefield 6 on my PC) was effectively seamless, with no obvious lip-sync error or delay.  It’s a fantastic low-latency option that will satisfy the majority of listeners and use cases.

EarFun equips the Air Pro 4+ with a hybrid active noise-cancelling system (QuietSmart 3.0). In practice, the ANC does a great job of blocking outside noise, reducing about 80% of ambient loudness in my tests (sound sources like airplane hum or AC units). This is roughly on par with many flagship TWS earbuds, where steady, low-frequency rumbles are cancelled substantially. The earbuds provide multiple ANC modes: “AI Ear Adaptive” (tunes to the seal and ear shape in real time), “AI Environment Adaptive” (uses external mic feedback), a manual adjustment slider, and a dedicated Wind Noise Cancelling mode for outdoor use. There is also a “strong ANC” preset (balanced toward maximum isolation).

On the flip side, the Transparency (or “Awareness”) mode is very useful and implemented well. There are two ambient modes (Default and Natural); both pass environmental audio well, with “Natural” letting through slightly less high-frequency noise for a more comfortable noise profile. Hearing announcements and conversations is easy, and unlike some wireless earbuds, they don’t amplify noise to absurd volumes, and instead focus simply on letting ambient sound in.

The user experience is generally polished. Touch controls are implemented on the flat area of each stem. They require taps (single/double/hold), not squeezes, and they proved responsive in my testing. There is a small dip to guide your finger for taps, and the controls never felt glitchy or janky. The default mapping lets you play/pause, skip tracks, answer calls, switch ANC modes, and control volume. All gestures are fully remappable through the app, so you can customize even double-tap or triple-tap to suit your workflow. For example, I customized the long press on the right earbud to enable Game Mode, so I can easily switch it on and off when I want to watch a video.

Pairing the earbuds is straightforward: open the charging case, and the LED flashes blue to enter pairing mode. Phones recognize them instantly, and reconnection afterward is automatic once the case is opened. The case itself indicates its charge via a multicolor front LED. In daily use, I experienced no strange behaviour. There were even several firmware updates made available during my testing period, most likely to resolve niche issues that I did not experience. It is nice to see, though, that EarFun is actively working on perfecting the user experience with these updates.

Battery life is a clear strength of the Air Pro 4+. Each earbud contains a 60 mAh battery, and the charging case contains a 600 mAh battery. With Active Noise Canceling on, EarFun says you can expect roughly 8 hours of playback per charge, and with ANC off, this extends to about 12 hours. Most of my testing is with either ANC or Transparency modes enabled.

When using aptX, aptX HD, and aptX Adaptive, I am getting between 7.5 and 8 hours of battery life. With aptX Lossless, I am getting closer to 6.5 hours, and with LDAC, I am getting 6 hours. This is usually how battery life breaks down when using different codecs, with the higher-bitrate codecs consuming more battery. Overall, I would rate the battery life of the Air Pro 4+ as excellent, and it’s also nice to see that EarFun are honest in their marketing.

Fast charging is supported, with just 10 minutes in the case yielding roughly 3 hours of listening. I unintentionally ended up testing this feature when I forgot to put the earbuds back in the case and only had about 10 percent battery left on the earbuds (they were already very low). Put them in the case for 10 minutes, and I was able to go about the rest of my day listening to them on and off.

The charging case, when fully charged, can refill the earbuds about 3–4 times before it itself needs recharging. In practice, this means total music playtime can approach 50 hours across case top-ups, making the Air Pro 4+ among the longest-lasting buds in its class. The case can be charged via USB-C or wirelessly (Qi), and a full charge replenishes it in about 2 hours.

The EarFun Air Pro 4+ focuses on a warm, balanced sound with emphasis on bass and midrange. They use a dual-driver arrangement (10 mm dynamic for lows and mid, plus a small balanced-armature for highs). This setup yields a rich, detailed presentation. In general, listening to the output is clean and full-bodied: instruments and vocals are clear and separated, and there’s a satisfying punch to the bass. Compared to the regular Air Pro 4, the 4+ sounded very similar overall, with the BA driver adding extra clarity up top.

Bass

The bass reproduction on the Air Pro 4+ is deep and controlled. Low frequencies are boosted just enough to add impact without muddying the rest of the mix. Mid-bass (the punchy thump of drums and beats) is tight and well-articulated. Sub-bass (the very lowest rumble you feel) is surprisingly strong for a small earbud, as you can hear and feel subs descend deeply on tracks like Angel by Massive Attack, but never in an uncontrolled way. Even at high volumes, the bass maintained clarity. Bass notes land quickly (not sluggish) and decay cleanly, giving rhythm-heavy music a satisfying drive.

Midrange

Midrange frequencies (vocals and most instruments) are a focal point of the 4+’s sound. The mid-bass, lower-midrange, and upper-midrange are all prominent but balanced, with vocals that sound warm, forward, and full-bodied. Male and female vocals are clear and sound natural. There is a slight warmth to voices (they lean a little intimate in tone), but detail retrieval is excellent. You can hear subtle breathiness or reverb, and instruments are distinct.

Treble

The treble reproduction is clean and decently extended, courtesy of the dedicated BA driver. Treble notes are crisp, with cymbals and acoustic percussion having natural sizzle, and high harmonics feel present. There is no offensive sharpness in normal use. That said, the tuning does lean slightly toward the mid-bass, so the highs aren’t completely emphasized. A subtle peak in the upper-treble provides some sparkle to the sound. In practical listening, this means fine detail is there, but it avoids the brightness of any kind. At very high volume, the treble can sound just a touch hot, but under normal volume levels, the highs remain smooth. Overall, the treble is well-managed and adds air to the mix without becoming harsh.

Soundstage and Imaging

Technically, the Air Pro 4+ punches above its weight. The dual-driver architecture is unusual at this price and yields measurable benefits (wider frequency response and improved clarity). Distortion is low even at high output, and crosstalk between channels is minimal. Stereo separation is good as the earbuds do not artificially widen the stage, but they present instruments distinctly left and right, giving a convincing stereo effect. They do not provide any faux surround or spatial audio processing, as such modes are not supported (and most listeners won’t miss them given the natural sound).

The EarFun Air Pro 4+ uses an array of six microphones with Qualcomm cVc 8.0 noise reduction for voice calls. In quiet to moderately noisy environments, call quality is solid and natural. My testing showed that speech is clear and intelligible, and the earbuds do a good job suppressing ambient chatter and machinery hum. In practice, your voice will come through as warm and clear indoors or on a busy street, and those on the other end of the call should be able to hear you without much trouble.

As with most wireless earbuds, extreme conditions expose their limitations. Heavy wind or very loud noises (like construction) can still degrade the mic quality. Also, the buds’ own noise reduction is tuned more for removing background than amplifying the speaker, so you may need to speak up slightly if the other party says you’re quiet. Comparatively, the Air Pro 4+ does about as well as peers in its class, which is to say pretty well for most occasions. Apple still is the performance king here, but the gap is getting smaller.

 The EarFun Air Pro 4+ emerges as one of the most compelling budget TWS earbuds of 2025. They combine many high-end features (dual drivers, LDAC/aptX Lossless, wireless charging, Auracast, etc.) with a polished real-world experience. Sound quality is a standout with a warm, detailed, and powerful sound profile, and rivals or exceeds that of much more expensive competitors. Battery life is excellent, and the robust companion app allows fine-grained tuning. Usability is generally smooth, with reliable Bluetooth, intuitive controls, and a comfortable fit. While the ANC isn’t the absolute best-in-class, it is still very effective in many situations, and the dual-mic system has decent call quality.

In short, the Air Pro 4+ gets it right where it matters most, all while adding extras normally reserved for pricier true wireless earbuds. For most users, especially those seeking great sound and advanced codecs in the sub-$100 range, they are an excellent choice. Only those who need truly top-tier noise cancellation or spatial audio should look elsewhere. But given the price, the EarFun Air Pro 4+ offers exceptional performance and value, earning it a very strong recommendation from me.

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