Sony WH-CH520 vs CMF Buds 2 Plus
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At a glance
Key specifications and important differences. Full details follow below.
| Feature |  Sony WH-CH520 |  CMF Buds 2 Plus |
|---|---|---|
| Price | KSh 7,500 | KSh 7,500 |
| Drivers | 11.82 in | 12mm LCP dynamic driver |
| Connection | Bluetooth + No | Bluetooth 5.4, supports Google Fast Pair, Microsoft Swift Pair, LDAC for Hi-Res |
| Active Noise Cancellation | No | Adaptive ANC up to 50dB with low, medium, high levels and smart mode |
| Battery Life | Up to 50 hours | Up to 14 hours / 61.5 hours with case (ANC off); 7.5 hours / 33 hours with case (ANC on) |
| Water & Dust Resistance | — | IP55 earbuds; IPX2 case |
| Weight | Approx. 5.19 oz, Approx. 5.2 oz | Earbud: 4.5g each; Case: 42.5g |
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Full specifications
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General
| Specification | Sony WH-CH520 | CMF Buds 2 Plus |
|---|---|---|
| Brand | Sony | CMF |
| Model | WH-CH520 | Buds 2 Plus |
| Announced | 2023 | 2025 |
| Type | Over-Ear Wireless Headphones | True Wireless In-Ear Earbuds |
| Color | Official colorways vary by market and selected variant | Blue, Light Gray |
Design
| Specification | Sony WH-CH520 | CMF Buds 2 Plus |
|---|---|---|
| Weight | Approx. 5.19 oz, Approx. 5.2 oz | Earbud: 4.5g each; Case: 42.5g |
| Dimensions | — | Earbud: 33.5 x 20.8 x 22.6 mm; Case: 53.3 x 53.3 x 22.9 mm |
Battery & Charging
| Specification | Sony WH-CH520 | CMF Buds 2 Plus |
|---|---|---|
| Battery Life | Up to 50 hours | Up to 14 hours / 61.5 hours with case (ANC off); 7.5 hours / 33 hours with case (ANC on) |
| Charging Time | Approx. 3 H | Earbuds: 1.5 hours; Case: 2 hours via USB-C; Quick: 10 min for 4.5 hours (ANC off) |
| Charging Port | USB-C | USB-C, 10 minutes for 4.5 hours playback (ANC off) |
| Wireless Charging | No | — |
| Fast Charging | — | 10 minutes provides up to 8.5 hours total |
Connectivity
| Specification | Sony WH-CH520 | CMF Buds 2 Plus |
|---|---|---|
| Connection | Bluetooth + No | Bluetooth 5.4, supports Google Fast Pair, Microsoft Swift Pair, LDAC for Hi-Res |
| Bluetooth | Bluetooth 5.2 | Bluetooth 5.4 |
| Bluetooth Range | 32.81 ft | 10m |
| Connector | N/A - wireless audio connection | — |
| Cable Length | N/A - no audio cable | — |
| App Support | Sony | Sound Connect | — |
Features
| Specification | Sony WH-CH520 | CMF Buds 2 Plus |
|---|---|---|
| Special Features | Digital Sound Enhancement Engine; multipoint | Hi-Res Audio Wireless; Personal Sound Profile; Ultra Bass |
Audio
| Specification | Sony WH-CH520 | CMF Buds 2 Plus |
|---|---|---|
| Drivers | 11.82 in | 12mm LCP dynamic driver |
| Frequency Response | 20 Hz–20,000 Hz (44.1 kHz Sampling) | 20Hz – 40kHz (with LDAC) |
| Audio Codecs | SBC, AAC | LDAC, AAC, SBC |
| Active Noise Cancellation | No | Adaptive ANC up to 50dB with low, medium, high levels and smart mode |
| Transparency / Ambient Mode | No | — |
| Microphones | Built-in microphones | 6 HD microphones with Clear Voice Technology 3.0 |
| Audio Features | Dsee | Hi-Res Audio Wireless, spatial audio, Personal Sound Profile, Ultra Bass, customizable EQ via Nothing X app |
Charging Case
| Specification | Sony WH-CH520 | CMF Buds 2 Plus |
|---|---|---|
| Case Type | N/A - no charging case | Charging case |
| Case Battery Life | N/A - no charging case | Included in the total battery-life figures above |
| Case Charging | N/A - no charging case | USB-C |
| Case Charging Port | N/A - no charging case | USB-C |
| Case Wireless Charging | N/A - no charging case | — |
| Case Dimensions | N/A - no charging case | — |
| Case Weight | N/A - no charging case | : 42.5g |
| Case Water & Dust Resistance | N/A - no charging case | — |
| Case Features | N/A - no charging case | Protective charging case |
Design & Controls
| Specification | Sony WH-CH520 | CMF Buds 2 Plus |
|---|---|---|
| Controls | Volume control | Touch on stems: play/pause, skip, volume, ANC modes |
| Ear Tips / Ear Cushions | Cushioned earcups | — |
| Water & Dust Resistance | — | IP55 earbuds; IPX2 case |
What's in the Box
| Specification | Sony WH-CH520 | CMF Buds 2 Plus |
|---|---|---|
| Headphones / Earbuds | WH-CH520 headphones | Buds 2 Plus earbuds |
| Charging Case | N/A - no charging case | Charging case |
| Charging Cable | USB Cable | USB-C charging cable |
| Audio Cable | N/A - not included | N/A - true wireless design |
| Ear Tips / Accessories | N/A - over-ear design | Ear tips/accessories supplied for the product design |
| Documentation | Quick start and safety documentation | Quick start and safety documentation |