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OpenBox CMF by Nothing Buds Pro 2 Earbuds
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OpenBox CMF by Nothing Buds Pro 2 Earbuds

3,499 ₹ 4,999

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Product Description

Powerful ANC: Offers up to 50 dB Active Noise Cancellation for immersive sound.
Dual Drivers: Features dual-driver setup for rich bass and clear treble.
Clear Calls: Equipped with 6 mics and AI noise reduction for crystal-clear calls.
Long Battery Life: Up to 43 hours of total playback with charging case.

🔍 Specifications & Key Features

CategoryDetails
Design & Build

• Available in White, Blue, Orange, Dark Grey

• Earbud size: 33.1 × 20.2 × 23.8 mm
• Charging case size: 53.4 × 53.4 × 23 mm 
• Weight: each bud ~ 4.9 g, case ~ 46 g, total ~ 55.8 g 
• IP55 rating for dust & water resistance 

Sound & Drivers• Dual‑driver setup: 11 mm bass driver + 6 mm micro-planar tweeter 
• Diaphragm materials: PU + PET (titanium-coated) for bass; PET + titanium for tweeter
• Audio codecs supported: AAC, SBC, LDAC 
• Dirac Opteo tuning, custom EQ, Ultra Bass Technology 2.0 
• Frequency response: 20 Hz – 40,000 Hz 
• Hi-Res Audio Wireless certified (with LDAC)
Noise Cancellation & Microphones• Hybrid Active Noise Cancellation (ANC) up to 50 dB depth
• Transparency mode, adaptive ANC, Smart ANC algorithm
• Each bud houses 3 microphones (for calls / ambient detection) 
• Call noise‑cancelling: “Clear Voice Technology 2.0” algorithm for clearer calls 
Battery & Charging• Bud capacity: 60 mAh each 
• Case capacity: 460 mAh  
• Playback (ANC off, AAC): up to 43 hours combined (buds + case) 
• Buds alone: up to 11 hours (ANC off) 
• With ANC / transparency on: up to 26 hours total (case + buds) 
• Buds use with ANC on: ~ 6.5 hours on a single charge 
• Using LDAC (high bitrate) reduces total playtime (e.g. ~ 16.6 h with case & ANC)
• Talk time (ANC off): ~ 6 hours (buds) / 25 hours (with case) 
• Talk time (with ANC): ~ 4.8 h (buds) / 18.6 h (case + buds) 
• Fast charging: 10 min gives ~ 3 h (ANC off) / ~ 1.8 h (ANC on) 
• Full charge (buds + case) via USB‑C: ~ 70 minutes 
• Case can charge buds to full in ~ 60 minutes 
Connectivity & Controls• Bluetooth version: 5.3 GSMArena+3Gadgets 360+3nothing.tech+3 
• Support for Google Fast Pair & Microsoft Swift Pair GSMArena+1 
• Dual‑device pairing (switch between two connected devices) Gadgets 360+1 
Smart Dial on the case: twist for volume, press to switch modes / toggle ANC / voice assistant / mute, etc.
• Spatial audio support, wear detection (auto-pause), custom EQ in Nothing X / 
• ChatGPT integration via the app (for CMF / Nothing phones) 
  

✅ Strengths & What It Does Well

  1. Feature-rich for the price
    Dual drivers + LDAC support + 50 dB hybrid ANC + Smart Dial make it stand out in its class. 
  2. Good battery performance (in ideal conditions)
    The 43-hour total playtime claim is appealing, especially for daily use without frequent charging. 
  3. Flexible controls via Smart Dial
    The twist / press gestures offer quick access without needing to open the phone app. 
  4. Strong ANC depth & tuning options
    With 50 dB ANC and algorithmic adaptation, plus Dirac tuning and EQ support, it can cater to different listening preferences.

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