Bose Ultra Open
With a 7-hour earbud battery (4 hours with Immersive Audio) and a 19.5-hour case, the open-ear design uses OpenAudio for private listening and Bose Immersive Audio to spatialize music, all in a 6-gram, flexible-joint build. Auto Volume dynamically adapts to changing noise levels, and an IPX4 rating handles sweat and splashes, making it practical for all-day wear. Ideal for runners and gym-goers who need spatial awareness without sacrificing music quality, but not suited for frequent callers.
Bu Earbuds hakkında
Enjoy the lightweight fit and surprisingly private audio of the Bose Ultra Open Earbuds, which offer an innovative open-ear design for environmental awareness. With OpenAudio tech, you can still revel in rich, private audio on the go, and with Bose Immersive Audio, you can experience riveting spatial audio anywhere.
- For Travel, Work, and Home Use
- Open-Ear Design for Spatial Awareness
- OpenAudio Tech for Rich, Private Sound
- Bose Immersive Spatial Audio
The 30-Second Version
These are the most comfortable open-ear buds out there, with surprisingly clear sound and killer awareness. Just don't buy them for phone calls or rumbling bass.
Overview
The Bose Ultra Open Earbuds are the most comfortable open-ear buds we've ever tested, and they pull off a neat trick: rich, private audio while keeping you totally aware of your environment. But there's a big catch — call quality is downright mediocre, and if you crave deep bass or noise isolation, you'll feel let down. These are purpose-built for casual listening and all-day wear, not for powering through a loud office or taking important calls.
Performance
We were genuinely surprised by how good the sound is. At the 91st percentile in our database, it's crisp, detailed, and the Immersive Audio mode gives movies a fun, spatial kick. The comfort is elite (93rd percentile) — you'll forget you're wearing them. Battery life is solid, easily lasting a workday. On the flip side, the mic performance (55th percentile) is a slog. Your voice comes across muffled, and the earbuds struggle in anything noisier than a quiet room, making them a poor choice for calls.
Pros & Cons
Pros
- Incredibly comfortable, they practically vanish on your ears after a few minutes 93th
- Sound is clear and surprisingly private despite the open design 91th
- Awareness of surroundings is a game-changer for walking, working, or travel 91th
- Battery life easily lasts a full workday and then some 89th
Cons
- Call quality is disappointing, your voice sounds muffled and distant
- Bass lacks punch and depth compared to sealed earbuds
- Fit is hit-or-miss; the clip-on design may not grip all ear shapes
- Pricey for what you get, especially at the high end of the range
The Word on the Street
Specifications
Full Specifications
Design
| Form Factor | open-ear |
| Wearing Style | Dual Ear True Wireless Earbud |
| Ear Tips | s |
| Weight | 0.0 kg / 0.0 lbs |
Audio
| Driver Type | Dynamic |
| Drivers | 1 |
| Freq Max | 20000 |
| Impedance | 46 |
| Sensitivity | 100 |
| Hi-Res Audio | Yes |
| Codecs | AAC, SBC |
| Surround | Spatial Audio |
Noise Control
| ANC | No |
| Transparency | Yes |
Connectivity
| Wireless | Yes |
| Bluetooth | 5.3 |
| Profiles | A2DP, HFP, BLE |
| Multipoint | No |
| Wired Connector | USB |
| Range | 9.1 |
Earbud Battery
| Battery Life | 7.5 |
| Charge Time | 1 |
| Fast Charging | 10 Minutes for 2 Hours |
| Charging | USB-C |
Case Battery
| Case Battery | 19.5 |
| Case Charging | USB-C |
| Wireless Charging | No |
Microphone
| Microphone | Yes |
| Mic Count | 4 |
| NC Mic | No |
Features
| Voice Assistant | Siri, Google Assistant |
| Touch Controls | Yes |
| App | Bose Music |
| Volume Limiting | No |
| Gaming Mode | No |
| Bone Conduction | No |
| Water Resistance | IPX4 |
Value & Pricing
Value depends heavily on the price you find. We're seeing a wild $152 spread across vendors. At $227 from Amazon, they're a decent buy if open-ear awareness is your priority. At $299 or the absurd $379 some stores list, you're in flagship ANC territory — and these can't compete there. Grab them below $250 or wait.
vs Competition
If you need strong ANC and reliable call quality, skip these and look at the Sony WF-1000XM5 or Sennheiser Momentum True Wireless 4. Both crush the Bose in noise isolation and voice clarity. Samsung's Galaxy Buds3 Pro are a better fit if you're deep in the Samsung ecosystem. But none of those offer open-ear awareness with jewelry-like clip-on comfort. For a cheaper open-ear design, Shokz OpenDots ONE exist, but their sound fidelity can't match what Bose pulls off here.
| Spec | Bose Ultra Open | Technics Reference Class EAH-AZ100-K | Sony WF-1000XM5 WF-1000XM5 | Sennheiser MOMENTUM True Wireless 4 | Samsung Galaxy Buds3 Pro SM-R630NZAAXAR | EarFun Air Pro Air Pro 4+ |
|---|---|---|---|---|---|---|
| Form Factor | open-ear | in-ear | in-ear | in-ear | in-ear | in-ear |
| Driver Type | Dynamic | Planar Magnetic | dynamic | dynamic | Dynamic | hybrid |
| Wireless | true | true | true | true | true | true |
| Active Noise Cancellation | false | true | true | true | true | true |
| Bluetooth Version | 5.3 | 5.3 | 5.3 | 5.4 | 5.4 | 6.0 |
| Battery Life Hours | 7.5 | 10 | 8 | 30 | 6 | 12 |
| Case Battery Hours | 19.5 | 28 | 24 | 30 | 26 | 54 |
| Water Resistance | IPX4 | IPX4 | IPX4 | IP54 | IP57 | IP55 |
| Multipoint | false | true | true | true | true | true |
| Compare | Compare | Compare | Compare | Compare |
| Product | Anc | Mic | Build | Sound | Battery | Comfort | Connectivity | Social Proof |
|---|---|---|---|---|---|---|---|---|
| Bose Ultra Open | 61.6 | 55.1 | 78.9 | 91.2 | 69.4 | 93.4 | 90.8 | 89.4 |
| Technics Reference Class EAH-AZ100-K Compare | 96.5 | 96.8 | 78.9 | 96.5 | 82.6 | 70.4 | 99.1 | 89.4 |
| Sony WF-1000XM5 WF-1000XM5 Compare | 96.5 | 96.8 | 78.9 | 99.3 | 76 | 93.4 | 100 | 80.2 |
| Sennheiser MOMENTUM True Wireless 4 Compare | 96.5 | 99.7 | 33.3 | 91.9 | 97.7 | 93.4 | 89.9 | 89.4 |
| Samsung Galaxy Buds3 Pro SM-R630NZAAXAR Compare | 96.5 | 96.8 | 98.9 | 89.9 | 73 | 93.4 | 97.8 | 89.4 |
| EarFun Air Pro Air Pro 4+ Compare | 96.5 | 96.8 | 91.3 | 99.8 | 96.3 | 70.4 | 99.3 | 80.2 |
Common Questions
Q: Are they any good for phone calls?
Honestly, no. The mics pick up your voice but it sounds processed and tinny, and they struggle in anything but quiet rooms. Look at the Sony WF-1000XM5 if calls matter.
Q: Can people around me hear what I'm listening to?
At moderate volumes, Bose's OpenAudio tech keeps the sound mostly private. Crank it up and someone sitting next to you might catch faint audio, but it's far less leakage than you'd expect from an open design.
Q: Will they stay put during a workout?
The IPX4 rating handles sweat, and the lightweight clip-on is secure for casual exercise. But during high-impact movement like sprints or box jumps, the fit can loosen on some ear shapes. For pure gym use, a true in-ear sports bud is more reliable.
Who Should Skip This
If you're looking for a single earbud that nails calls, heavy bass, and noise isolation, this isn't it. Grab the Sony WF-1000XM5 or Sennheiser Momentum True Wireless 4 instead — both beat the Bose in everything except open-ear awareness and all-day comfort.
Verdict
The Bose Ultra Open Earbuds are the best open-ear, all-day-comfort buds you can buy right now, as long as you accept their Achilles' heel: calls are a letdown and bass is polite. If you want a stylish, awareness-first audio companion for music and podcasts in quiet places, they're a joy. If you need one earbud to do it all, look elsewhere.
