Wireless Earbuds
Sennheiser MOMENTUM True Wireless 4
8.5/10SoundGuys scoreRead our review ›
$299.95at Amazon
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CMF by Nothing
CMF by Nothing Buds 2
noise cancelling & sound
8.3/ 10
ANCNoise cancelling8.3
0.010.0
At 8.3, its noise cancelling beats 77% of wireless earbuds we've measured.
Measured on 93 of the 259 we've cataloged.
4.8/ 5
SoundMDAQS Overall4.8
1.05.0
A 4.8 puts its audio quality in the top half of wireless earbuds we've measured.
Measured on 61 of the 259 we've cataloged.
See the lab data ↓Frequency response · Isolation · Noise cancelling · Audio quality
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Key specs
Battery Life Earbuds
9 hAbove average9 h
3 h15 h
above average for wireless earbuds — based on 241 of 259 we've cataloged.
Battery Life With Case
55 hAbove average55 h
7 h60 h
above average for wireless earbuds — based on 239 of 259 we've cataloged.
IP Rating
IP55IPX436%IP5516%IP5416%IPX511%
IP55 appears on 16% of the 238 wireless earbuds we've cataloged (of 259).
Live translation
NoneMost commonNone54%Platform ai33%In-app13%
None is the most common — on 54% of the 24 wireless earbuds we've cataloged (of 259).
Battery
- Battery Life Earbuds
- 9 h
- Battery Life With Case
- 55 h
- Charging Method
- USB-C
- Full Charge Minutes
- 10 min
- Battery Life Anc On
- 23 h
- Charging Case Capacity
- 50 mAh
- Earbud Capacity
- 50 mAh
- Fast Charging
- Yes
Build
- IP Rating
- IP55
- Sweat Resistance
- Yes
- Water Resistance
- Yes
- Material Case
- Plastic
- Material Chassis Primary
- Plastic
Features
- Live translation
- None
- Certified For
- Google Fast Pair
- Companion App
- Yes
- Control Type
- Touch controls
- Eq Customization
- Yes
- Find My Device
- Find My Device (Google)
- Gaming Mode
- Standard
- Auto Connect
- Yes
- Auto Pause
- Yes
- Fitness Tracking
- No
- Mono Mode
- Yes
- Spatial Audio
- Yes
- Voice Assistant Support
- Google Assistant
Sound
- Noise Cancellation Type
- Active
- Ambient Levels
- Variable
- Ambient Mode
- Standard
- Anc Depth
- 48 dB
- Anc Modes
- Off,anc,transparency
- Driver Count
- 1
- Driver Size
- 11 mm
- Driver Type
- Dynamic
- Frequency Response
- 20-20000 Hz
- Frequency Response High Hz
- 20000 Hz
- Frequency Response Low Hz
- 20 Hz
- Frequency Response Signature
- Balanced
- Adaptive Anc
- Yes
- Impedance
- 16 Ω
- Passive Isolation
- 20 dB
Connectivity
- Bluetooth Version
- 5.4
- Bluetooth Codec
- AAC, SBC
- Bluetooth Range
- 10 m
- Connection Type
- Bluetooth
- Headphone Jack
- No
- Latency
- 110 ms
- Multipoint Devices
- Yes - 2 devices
Design
- Earbud Form Factor
- In-ear
- Color Options
- Orange, dark gray, light gray
- Ear Tip Material
- Silicone
- Ear Tip Sizes Included
- S, M, L
- Wearing Style
- Deep insert
- Weight Per Earbud
- 4 g
- Weight With Case
- 41.5 g
Microphone
- Count
- 6
- Wind Noise Reduction
- Yes
- Noise Reduction Type
- AI-powered
- Type
- Mic array
Release
- Date
- April 28, 2025
- Msrp Usd
- 59 USD
- Year
- 2025
Lab data
How we test ›Objective measurements from the SoundGuys test lab — overlay other models to see how this one compares.
CMF by Nothing Buds 2SoundGuys Headphone Preference Curve
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 | 8.8 |
| 25 | 8.9 |
| 32 | 9.0 |
| 40 | 8.9 |
| 50 | 8.7 |
| 63 | 7.8 |
| 80 | 6.1 |
| 100 | 3.9 |
| 125 | 2.1 |
| 160 | 0.6 |
| 200 | 0.4 |
| 250 | 0.8 |
| 315 | 1.5 |
| 400 | 0.5 |
| 500 | -0.9 |
| 630 | -1.0 |
| 800 | -0.2 |
| 1000 | 0.0 |
| 1250 | 1.2 |
| 1600 | 4.0 |
| 2000 | 7.3 |
| 2500 | 9.6 |
| 3150 | 9.9 |
| 4000 | 7.5 |
| 5000 | 9.4 |
| 6300 | 4.3 |
| 8000 | 5.6 |
| 10000 | -3.5 |
| 12500 | 6.4 |
| 16000 | -5.7 |
| 20000 | -25.0 |
CMF by Nothing Buds 2
Passive isolation (dB) with ANC off — how much ambient noise the fit blocks on its own. Higher on the chart means more attenuation.
| Frequency (Hz) | Attenuation (dB) |
|---|---|
| 21 | -3.3 |
| 26 | -0.8 |
| 33 | 1.1 |
| 41 | 1.2 |
| 52 | 0.8 |
| 65 | 1.9 |
| 82 | 2.0 |
| 103 | 2.6 |
| 130 | 2.6 |
| 163 | 1.7 |
| 205 | 3.6 |
| 259 | 5.0 |
| 325 | 6.2 |
| 410 | 8.7 |
| 516 | 6.8 |
| 613 | 7.3 |
| 772 | 10.2 |
| 972 | 11.5 |
| 1220 | 13.6 |
| 1540 | 15.4 |
| 1940 | 20.2 |
| 2440 | 29.6 |
| 3070 | 29.7 |
| 3870 | 24.3 |
| 4870 | 12.9 |
| 6130 | 21.2 |
| 7720 | 37.8 |
| 9720 | 29.9 |
| 12200 | 29.5 |
| 15400 | 35.8 |
| 19400 | 23.6 |
CMF by Nothing Buds 2
Total attenuation (dB) with ANC on — passive isolation plus active noise cancelling. Higher on the chart means more attenuation.
| Frequency (Hz) | Total attenuation (dB) |
|---|---|
| 21 | 9.4 |
| 26 | 17.5 |
| 33 | 16.8 |
| 41 | 20.8 |
| 52 | 26.0 |
| 65 | 27.2 |
| 82 | 32.2 |
| 103 | 33.2 |
| 130 | 30.8 |
| 163 | 24.9 |
| 205 | 30.6 |
| 259 | 25.4 |
| 325 | 23.1 |
| 410 | 17.2 |
| 516 | 16.3 |
| 613 | 19.5 |
| 772 | 23.7 |
| 972 | 22.7 |
| 1220 | 21.0 |
| 1540 | 24.3 |
| 1940 | 32.1 |
| 2440 | 43.1 |
| 3070 | 38.1 |
| 3870 | 23.6 |
| 4870 | 10.8 |
| 6130 | 24.7 |
| 7720 | 33.2 |
| 9720 | 29.8 |
| 12200 | 23.1 |
| 15400 | 37.9 |
| 19400 | 21.9 |
CMF by Nothing Buds 2
4.9
3.7
3.8
4.8
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.
SoundGuys review
Noise cancelling8.3
Isolation6.0
Battery life7.7
Comfort & fit8.5
Connectivity8.0
Design7.0
The verdict
The CMF Buds 2 Plus offers impressive audio performance and innovative personalization features at a budget-friendly price. Still, the puzzling removal of the previous model's standout Smart Dial makes this "upgrade" feel incomplete despite technical improvements.
✓Liked: Sound quality, ANC, Bluetooth 5.4 with LDAC, Price
✕Could be better: No Smart Dial, No wireless charging
Owners
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Video reviews and comparisons for this product.
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