arkivoAPI

Earbuds / Compare

CMF Buds 2 vs soundcore P31i

68 of 157 fields differ

Download CSVDownload JSON
  • 36 different values
  • 32 known for one only
  • 26 the same
  • 63 missing for both

Biggest differences

Each bar uses the scale of all 138 earbuds.

  1. Battery lifeA: 13.5hB: 10hCMF is 3.5 h higher.
  2. Total with case and ANC (claimed)A: 32hB: 40hsoundcore is 8 h higher.
  3. Quick chargeA: 4hB: 3.5hCMF is 0.5 h higher.

All 166 fields

Every value links to where we found it.

ACMF Buds 2
Bsoundcore P31i

General

6 of 8 differ
Series
Not available
Not available
Announced
Not available
Predecessor
Not available
Not available
Successor
Not available
Not available
Launch price (EU)
Not available

Design

1 of 4 differ
Use one bud alone
Not available
RGB lighting
Not available
Not available

Drivers and sound

7 of 17 differ
Driver size
11mm
11mm
Drivers per bud
1
Not available
Sensitivity
Not available
Not available
Sensitivity reference
Not available
Not available
Max sample rate
Not available
Not available
Max bit depth
Not available
Not available
Adaptive EQ
Not available
Not available
Onboard EQ
Not available
Not available
Custom EQ bands
Not available
Volume limit
Not available
Not available

Spatial audio

1 of 2 differ
Head tracking
Not available
Not available

Noise cancelling

4 of 11 differ
ANC type
Not available
ANC microphones in both earbuds
Not available
Not available
Automatic ANC and transparency blend
Not available
Not available
Conversation detection
Not available
Not available

Measured

6 of 23 differ
Bass amount (measured)
Not available
Treble amount (measured)
Not available
Deviation from target (measured)
Not available
Not available
Consistency between fittings (measured)
Not available
Not available
Harmonic distortion (measured)
Not available
Not available
Sound leakage (measured)
Not available
Not available
Noise isolation (measured)
Not available
Not available
Noise isolation, best (measured)
Not available
Not available
Passive isolation (measured)
Not available
Not available
Call quality notes (measured)
SoundGuys describes good clarity and natural tonality in ideal conditions and effective wind noise reduction outdoors. Street conditions work better than a busy office, where ringing phones still come through.7Measurementsoundguys.com/cmf-buds-2-review-137571Read 15 October 2026Reviewer observations from published ideal, office, street, windy and reverberant demos. Firmware 1.0.128.
Mic low-frequency extension (measured)
Not available
Not available
Mic high-frequency extension (measured)
Not available
Not available
Mic speech-to-noise ratio (measured)
Not available
Not available
Latency (measured)
Not available
Not available
Bluetooth latency, worst (measured)
Not available
Not available
2.4 GHz latency, worst (measured)
Not available
Not available
Latency in game mode (measured)
Not available
Not available
Longest tested use per charge
13.28h
7.3h
Battery life with case (measured)
Not available
Not available
Full charge time (measured)
Not available
Not available
Weight per bud (measured)
Not available
Not available

Microphones and calls

1 of 7 differ
Bone conduction voice sensor
Not available
Not available
Call audio bandwidth
Not available
Not available
Mic mute control
Not available
Sidetone
Not available
Not available

Connectivity

4 of 18 differ
Chip
Not available
Not available
Bluetooth profiles
Not available
Not available
LE Audio
Not available
Not available
Auracast
Not available
Not available
Paired devices remembered
Not available
Not available
Automatic switching between own devices
Not available
Not available
Audio sharing
Not available
Not available
Wireless receiver
Not available
Not available
Receiver connector
Not available
Not available
Simultaneous 2.4 GHz and Bluetooth audio
Not available
Not available

Latency

3 of 3 differ
Claimed latency
Bsoundcore P31i
Not available
Lowest claimed latency
110ms
Not available

Compatibility

3 of 4 differ
Connection per platform
ACMF Buds 2
PlatformConnection
AndroidBluetooth
iOSBluetooth
Features that need a specific device
ACMF Buds 2
FeatureNeeds
Custom controls and advanced settingsTurn on custom controls with a phone. Nothing OS 1.5.6 or later has the settings built in. Other Android 6.0 or later and iOS 13 or later devices use the Nothing X app.
110 ms Game Mode latencyEarbuds paired with a Nothing phone with Game Mode turned on.
Google Fast PairSupported Android device with Google Play services 11.7 or later. Android 6.0 or later. Find My and device renaming need Android 10 or later.
Clear Voice Technology 3.0Applies only when the microphones record voice, such as on a call or a voice message.
Bsoundcore P31i
FeatureNeeds
Regional namingP31i and R60i NC are regional names of D1202 in the maker guide. Reference is US Midnight Black D1202Z11. Japanese codec/app statements are not transferred.
LDACAndroid 8.0+ and compatible LDAC host. Select Preferred audio quality in the soundcore app. LDAC is unavailable on iOS and disables Spatial Audio according to current maker FAQ.
Dual Connections with LDACSupported by current exact maker FAQ. Earlier review reports the features as mutually exclusive. Firmware minimum is not documented.
AI assistant and translationLatest soundcore app connected to earbuds. Allow Android background app operation. Disable Dual Connections for real-time translation as instructed by current guide.
Google Fast PairAndroid 6.0+ with Google Fast Pair support.
Single-earbud listeningPlace other earbud in charging case and close lid. Mono control diagram uses Normal or Transparency mode, not ANC.
Computer callsWindows conferencing software uses P31i hands-free microphone and speaker. Mac selects P31i input/output. Music-only stereo output does not establish call microphone routing.
Official licence
Not available
Not available

Battery and charging

11 of 13 differ
User-replaceable earbud battery
Not available
Not available
Claimed battery life
Longest claimed use per charge
13.5h
10h
Playback per charge with ANC (claimed)
7.5h
8h
Playback per charge without ANC (claimed)
13.5h
10h
Total with case (claimed)
55h
50h
Total with case and ANC (claimed)
32h
40h
Talk time (claimed)
8.5h
Not available
Charging guidance
The maker charging time table lists Full Charge 93 minutes and Earbuds in Case 62 minutes. It does not say whether the earbuds sit inside the case for the 93 minute figure. A 5 V 1 A adapter or higher is needed for fast charging.1Maker product pageus.nothing.tech/products/cmf-buds-2Read 15 October 2026
Not available

Charging case

2 of 10 differ
User-replaceable case battery
Not available
Not available
Wireless standards
Not available
Not available
Wireless charging power
Not available
Not available
Speaker in case
Not available
Not available
Screen on case
Not available
Not available
Case works as audio transmitter
Not available
Not available

Controls

3 of 5 differ

Sensors and health

2 of 9 differ
Sensors
Not available
Not available
Heart rate sensor
Not available
Not available
Skin temperature sensing
Not available
Not available
Hearing aid feature
Not available
Not available
Medical clearances
Not available
Not available
Hearing test
Not available
Hearing protection
Not available
Not available
Health features
Not available
Not available

Fit and durability

3 of 7 differ
Stabilisers
Not available
Not available
Water resistance depth
Not available
Not available

Software

2 of 6 differ
Finding network
Not available
Not available
Precision finding
Not available
Not available

Dimensions and weight

4 of 4 differ
Weight per bud
Not available
Bud dimensions
Not available
Case weight
Not available
Case dimensions
Not available

Certifications

2 of 3 differ
Communication certifications
Not available
Not available

In the box

2 of 2 differ

Warranty

1 of 1 differ
Manufacturer warranty (source market)
Not available

Both are also in the API. Back to all earbuds.