Bone Conduction Headphones
SHOKZ OpenRun Pro 2
7.3/10SoundGuys scoreRead our review ›
$179.95at Amazon
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1 / 10SHOKZ
SHOKZ OpenFit 2+
Battery Life & durability / build quality
8/ 10
Battery Life8
0.010.0
A 8 puts its battery life in the top quarter of bone conduction headphones we've measured.
Measured on 8 of the 19 we've cataloged.
8/ 10
8
0.010.0
A 8 puts its durability / build quality in the top quarter of headphones we've measured.
Measured on 233 of the 510 headphones we've cataloged.
See the lab data ↓Frequency response · Isolation · Noise cancelling · Audio quality
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Key specs
Transducer Type
Bone conduction56%Air conduction (open-ear)44%
Air conduction (open-ear) appears on 44% of the 18 bone conduction headphones we've cataloged (of 19).
Battery Life Wireless
11 hAbove average11 h
6 h12 h
above average for bone conduction headphones — based on 15 of 19 we've cataloged.
IP Rating
IP55Most commonIP5553%IP6720%IP5413%IP687%
IP55 is the most common — on 53% of the 15 bone conduction headphones we've cataloged (of 19).
Music Storage
NoMost commonFalse88%True13%
False is the most common — on 88% of the 16 bone conduction headphones we've cataloged (of 19).
Sound
- Transducer Type
- Air conduction (open-ear)
- Ambient Mode
- Standard
- Anc Modes
- Off, ANC on, transparency, adaptive, ANC + transparency
- Driver Count
- 2
- Driver Size
- 17.3 mm
- Driver Type
- Hybrid
- Frequency Response
- 20-20000 Hz
- Frequency Response High Hz
- 20000 Hz
- Frequency Response Low Hz
- 20 Hz
- Impedance
- 19 Ω
Battery
- Battery Life Wireless
- 11 h
- Battery Life Earbuds
- 11 h
- Battery Life With Case
- 48 h
- Charging Method
- Wireless charging
- Full Charge Minutes
- 10 min
- Fast Charging
- Yes
Build
- IP Rating
- IP55
- Sweat Resistance
- Yes
- Water Resistance
- Yes
Features
- Music Storage
- No
- Companion App
- IOS + Android
- Control Type
- Physical buttons, touch controls
- Eq Customization
- Presets only, full parametric EQ
- Auto Connect
- Yes
- Auto Pause
- No
- Mono Mode
- Yes
- Spatial Audio
- Fixed
Connectivity
- Bluetooth Version
- 5.4
- Connection Type
- Bluetooth
- Headphone Jack
- No
- Multipoint Devices
- 2 devices
Design
- Color Options
- Beige, black
- Earbud Form Factor
- Open-ear
- Wearing Style
- Ear hook
- Weight
- 9.4 g
- Weight Per Earbud
- 5.8 g
- Weight With Case
- 51 g
Identity
- Model Number
- SHOKZ T921
Microphone
- Count
- 4
- Microphone
- Yes
- Wind Noise Reduction
- No
- Noise Reduction Type
- AI-powered noise reduction
- Type
- Quad microphone
Release
- Date
- 2025-01-07
- Msrp Usd
- 199.95 USD
- Year
- 2025
Lab data
How we test ›Objective measurements from the SoundGuys test lab — overlay other models to see how this one compares.
SHOKZ OpenFit 2+ Frequency Response (measured on a B&K 5128)
Click a line or a legend entry to highlight it. Click again to clear.Tap a legend entry to highlight its line. Tap again to clear.
Measured frequency response (dB relative) against the SoundGuys Headphone Preference Curve. When the measurement goes above the dashed line, that frequency is louder than our preference curve, and when it goes below: it's quieter. Use the curve for comparison purposes only, as your taste may vary.
| Frequency (Hz) | Response (dB) |
|---|---|
| 20 | -31.8 |
| 25 | -34.2 |
| 32 | -34.7 |
| 40 | -26.5 |
| 50 | -13.6 |
| 63 | -3.9 |
| 80 | -0.8 |
| 100 | -0.6 |
| 125 | -1.2 |
| 160 | -1.9 |
| 200 | -3.6 |
| 250 | -4.9 |
| 315 | -5.1 |
| 400 | -4.5 |
| 500 | -3.6 |
| 630 | -2.1 |
| 800 | -0.4 |
| 1000 | 1.3 |
| 1250 | 3.5 |
| 1600 | 6.6 |
| 2000 | 9.4 |
| 2500 | 11.7 |
| 3150 | 7.1 |
| 4000 | 6.0 |
| 5000 | 6.1 |
| 6300 | 0.0 |
| 8000 | 2.7 |
| 10000 | -4.5 |
| 12500 | -6.7 |
| 16000 | -12.4 |
| 20000 | -46.1 |
SHOKZ OpenFit 2+ Attenuation (measured on a B&K 5128)
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Solid lines: passive isolation (dB) with ANC off — how much ambient noise the fit blocks on its own. Dashed lines: total attenuation (dB) with ANC on — passive isolation plus active noise cancelling. Higher on the chart means more attenuation.
| Frequency (Hz) | Attenuation (dB) |
|---|---|
| 21 | 2.1 |
| 26 | -0.3 |
| 33 | 0.1 |
| 41 | 0.1 |
| 52 | 0.0 |
| 65 | -0.0 |
| 82 | 0.0 |
| 103 | 0.0 |
| 130 | -0.0 |
| 163 | -0.1 |
| 205 | -0.0 |
| 259 | -0.0 |
| 325 | -0.1 |
| 410 | -0.0 |
| 516 | -0.2 |
| 613 | -0.2 |
| 772 | -0.4 |
| 972 | -0.5 |
| 1220 | -0.7 |
| 1540 | -0.9 |
| 1940 | -1.7 |
| 2440 | -2.2 |
| 3070 | 1.9 |
| 3870 | 2.1 |
| 4870 | -1.9 |
| 6130 | 5.7 |
| 7720 | 5.5 |
| 9720 | 4.4 |
| 12200 | 0.1 |
| 15400 | 12.8 |
| 19400 | 1.0 |
| Frequency (Hz) | Total attenuation (dB) |
|---|---|
| 21 | 2.4 |
| 26 | -2.2 |
| 33 | -0.3 |
| 41 | -0.2 |
| 52 | -0.1 |
| 65 | 0.2 |
| 82 | 0.9 |
| 103 | 1.9 |
| 130 | 2.1 |
| 163 | 1.6 |
| 205 | 2.5 |
| 259 | 2.6 |
| 325 | 2.7 |
| 410 | 2.8 |
| 516 | 2.9 |
| 613 | 2.8 |
| 772 | 2.5 |
| 972 | 2.4 |
| 1220 | 2.0 |
| 1540 | 1.6 |
| 1940 | 0.3 |
| 2440 | -1.1 |
| 3070 | 3.5 |
| 3870 | 3.1 |
| 4870 | -2.1 |
| 6130 | 5.9 |
| 7720 | 6.1 |
| 9720 | 4.8 |
| 12200 | -0.7 |
| 15400 | 11.4 |
| 19400 | 1.0 |
SHOKZ OpenFit 2+ MDAQS
Multi-Dimensional Audio Quality Scores, Scale 1 - 5
Mean opinion score
2.1
4.5
3.7
3.2
TimbreDistortionImmersivenessOverall
Virtual mean opinion scores (MOS) on a 1–5 scale, modeled from the measured response by HEAD acoustics’ MDAQS (Multi-Dimensional Audio Quality Score) model. Higher is better across timbre, distortion, and immersiveness — add other models to see where this one lands.
SoundGuys review
Noise cancelling1.6
Isolation0.6
Battery life8.0
Comfort & fit8.5
Connectivity6.0
Design7.0
The verdict
The OpenFit Pro delivers noise reduction on open-ear earbuds with Shokz's best sound quality yet, but the uncomfortable ANC pressure sensation and $50 premium make them a tough sell unless you specifically need partial noise dampening. Great call quality and battery life can't overcome the fact that you might disable the defining feature entirely.
✓Liked: Noise reduction works, Improved fit stability, 10-band EQ
✕Could be better: ANC pressure sensation, No Auracast support, Mics suffer in wind
Owners
How we verify ownersNobody who owns the SHOKZ OpenFit 2+ has written in yet.
Owner reviews are not paid for, not solicited from specific owners, and not rewritten by us: at most we proofread typos, which is shown on the review’s own page and which the author can undo. The commission SoundGuys may earn on this page comes from retail links, never from owner reviews.
Own the SHOKZ OpenFit 2+?
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Questions from readers
What readers ask about the SHOKZ OpenFit 2+, answered by the people who own it.
Nobody has asked the owners yet.
Ask the first question →Video reviews and comparisons for this product.
Features & Opinions
More from the team ›Commentary and deep dives from the SoundGuys editorial team.
I've reviewed headphones for over a decade: Here are 5 things I wish they did differentlyHeadphone companies: help me help you
Christian ThomasEditor-at-large5 ways headphones are going to change in 2027Here's where things are headed.Christian ThomasEditor-at-largeWired vs wireless headphones: Which should you buy?Wired headphones do not automatically sound better.
Tom TriggsContributorHere's how we're recording mic samples for earbuds with bone conduction pickupsWe have a bone to pick with earbudsChristian ThomasEditor-at-large
Christian ThomasEditor-at-large5 ways headphones are going to change in 2027Here's where things are headed.Christian ThomasEditor-at-largeWired vs wireless headphones: Which should you buy?Wired headphones do not automatically sound better.Tom TriggsContributorHere's how we're recording mic samples for earbuds with bone conduction pickupsWe have a bone to pick with earbudsChristian ThomasEditor-at-largeMore Bone Conduction Headphones
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