Bone Conduction Headphones
SHOKZ OpenRun Pro 2
7.3SoundGuys 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 9 of the 19 we've cataloged.
8/ 10
8
0.010.0
A 8 puts its durability / build quality in the bottom 10% of bone conduction headphones we've measured.
Measured on 8 of the 19 we've cataloged.
Key specs
Transducer Type
Bone conduction59%Air conduction (open-ear)41%
Air conduction (open-ear) appears on 41% of the 17 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 14 of 19 we've cataloged.
IP Rating
IP55Most commonIP5550%IP6725%IP5413%IP686%
IP55 is the most common — on 50% of the 16 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
- 9.4 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
SoundGuys review
Read the full 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.
✓What we like
✓Noise reduction works
✓Improved fit stability
✓10-band EQ
✕What could be better
✕ANC pressure sensation
✕No Auracast support
✕Mics suffer in wind
Lab data
How we test ›Objective measurements from the SoundGuys test lab — overlay other models to see how this one compares.
SHOKZ OpenFit 2+SoundGuys Headphone Preference Curve
Measured frequency response (dB) against the SoundGuys house target — the dashed curve. The closer the measured line tracks the target, the more neutral the tuning; peaks ride above the target, dips fall below it.
Frequency response — measurement data
| Frequency (Hz) | Response (dB) |
|---|---|
| 20 | -33.0 |
| 25 | -35.4 |
| 32 | -35.9 |
| 40 | -27.8 |
| 50 | -14.8 |
| 63 | -5.1 |
| 80 | -2.1 |
| 100 | -1.9 |
| 125 | -2.4 |
| 160 | -3.2 |
| 200 | -4.9 |
| 250 | -6.2 |
| 315 | -6.3 |
| 400 | -5.8 |
| 500 | -4.8 |
| 630 | -3.3 |
| 800 | -1.7 |
| 1000 | 0.1 |
| 1250 | 2.3 |
| 1600 | 5.4 |
| 2000 | 8.1 |
| 2500 | 10.4 |
| 3150 | 5.8 |
| 4000 | 4.7 |
| 5000 | 4.9 |
| 6300 | -1.3 |
| 8000 | 1.4 |
| 10000 | -5.8 |
| 12500 | -8.0 |
| 16000 | -13.6 |
| 20000 | -47.4 |
SHOKZ OpenFit 2+
Passive isolation (dB) with ANC off — how much ambient noise the fit blocks on its own. Higher on the chart means more attenuation.
Passive isolation — measurement data
| 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 |
SHOKZ OpenFit 2+
Total attenuation (dB) with ANC on — passive isolation plus active noise cancelling. Higher on the chart means more attenuation.
Noise cancelling — measurement data
| 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+
2.1
4.5
3.7
3.2
Multi-Dimensional Audio Quality Scores (1–5), modeled from the measured response. Higher is better across timbre, distortion, and immersiveness — add other models to see where this one lands.
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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