EarFun OpenJump

Design and Comfort

Weighing in at just eight grams per side, the EarFun OpenJump feature a slim design that sits comfortably and securely due to its ergonomic shape. The open-ear format ensures you hardly notice you’re wearing them. They are also suited for sporting activities, thanks to their water- and sweat-resistant IPX7 rating.

Battery Life

Despite their low weight, these hook earbuds can reach nearly eleven hours of playtime at higher volume levels when using AAC. The case provides three full recharges, resulting in about 43 total hours of playback. The earbuds take around 45 minutes to fully charge, while the charging case replenishes in approximately one hour and 45 minutes via the supplied USB-C to USB-A cable. Additionally, you can power the case wirelessly using Qi charging.

Bluetooth Specs

Beyond Bluetooth 5.3, the EarFun OpenJump include Google Fast Pair for speedy connections to Android devices. They also support multipoint connections, though currently with limitations when pairing Apple devices. For example, if you connect to a MacBook Air and an iPad simultaneously, some app-based features (such as Theater Mode or certain EQ settings) may not function correctly—even though you can still attempt to activate them in the app. However, pairing an Android phone (like a Nothing Phone) alongside a MacBook Air poses no issues, and iPad usage alone also works seamlessly. EarFun can likely fix these limitations through a firmware update.

The earbuds support SBC, AAC, and LDAC codecs. They also come with a latency-reduced Gaming Mode for playing computer or mobile games and for watching movies.

Controls

The touch controls are somewhat less intuitive due to the ergonomic shape; the touch-sensitive surfaces are positioned at a slant, requiring a bit of trial and error to find the correct angle, especially given the small surface area. On the plus side, the companion app offers significant customization options for single, double, triple taps, and long presses.

By default, you can manage playback, adjust volume, handle calls, summon voice assistants, and skip tracks. You can also add the Gaming Mode and disable either earbud if desired. However, Theater Mode cannot be assigned to any gesture, nor is there a way to power the earbuds on/off manually. You can, however, use just one earbud at a time.

EarFun Audio App

Central to the app experience (Android/iOS) is the extensive EQ control. You can choose from 14 presets that raise or lower bass, mids, and treble in varying degrees, plus 15 more genre-specific settings ranging from Hip-Hop to Classical. A 10-band EQ lets you craft and save custom presets. However, the built-in Sound Profile feature produces an excessively bass-heavy result that tends to clip or distort, so it’s best avoided until EarFun refines it.

Additionally, you can adjust the earbuds’ voice prompt volume through the app. Multipoint connections, the Gaming Mode, and Theater Mode can be enabled or disabled as needed. A built-in finder feature emits a tone to help you locate a missing earbud, and you can configure a sleep timer and manage firmware updates as well. Android users also have the option to enable LDAC via the app.

Call Clarity

Four AI-assisted microphones do a good job filtering out standard wind noise, although stronger gusts—especially direct headwinds—can still pose issues. The earbuds handle busy environments better, damping the background so your voice remains clear. Keep in mind, though, that the open-ear design can make it difficult to hear the other party in loud settings. Conversely, in quiet surroundings, you can hear your own voice naturally, creating a more lifelike conversation.

Theater Mode

Even in standard playback, the open-ear design offers a spacious soundstage. Engaging Theater Mode intensifies that spaciousness, pushing the virtual stage deeper—great for movies, gaming, and live or concert recordings. However, voice clarity is better in normal mode, as Theater Mode provides a less precise reproduction of vocals. Note also that you cannot combine Theater Mode with the app’s EQ settings.

Sound

Equipped with dynamic 14.2 mm wool composite drivers, the EarFun OpenJump use proprietary BassSurge technology to counteract the open-ear design’s inherent bass loss. In part, this works well, and the bass presence is impressive for open-ear earbuds, ensuring plenty of fun listening. But the low-end enhancement overshoots in the deep bass region, risking distortion on club-oriented music. We do not recommend further boosting the bass via EQ or the bass-heavy Sound Profile. If your musical tastes lean strongly toward bass, you might even consider lowering the low end.

The midrange excels with clear, expressive vocals, maintaining presence for music, dialogue, and audiobooks. Even complex arrangements retain a sense of space and coherence, letting you pick up details during laid-back listening.

Treble presence increases notably at higher volumes. At moderate volumes, highs can seem subdued; boost the level, and there’s significant sparkle—along with sharper sibilance. That narrow sweet spot yields a more balanced overall sound.

Conclusion

At launch, the EarFun OpenJump aren’t entirely free of growing pains. Their bass enhancement technology and Sound Profile need more work. Yet these lightweight, IPX7-rated open-ear earbuds excel in fit and comfort, practically vanishing once you put them on. Despite some oversights, EarFun has delivered an appealing mix of strong bass, clear mids, and ample sound customization—ideal for users who prioritize comfort and an open-ear form factor that doesn’t skimp on listening enjoyment.