Technical Specifications of OnePlus Buds 4

Dimensions & Weight

• Earbuds: 31 × 20.6 × 24.2 mm

• Charging Case: 65.4 × 52.4 × 25.3 mm

• Weight:

  • Earbuds: 4.73 ± 0.2 g

  • Charging Case: 39.57 ± 1 g

  • Total: 49.02 ± 1 g

Audio Features

• Drivers: 11mm woofer + 6mm tweeter (dual drivers)
• Frequency Response: 15Hz – 40KHz
• Driver Sensitivity: 118 ± 1.3dB @1mW
• Microphone Sensitivity: -38 ± 1dB
• Microphones: 3 mics per earbud

• Impedance:

  • 18Ω ± 15% (Woofer)
  • 10Ω ± 15% (Tweeter)

• Sound Pressure Level (SPL): 96.5dB

• Rated Power: 10mW

Noise Cancellation

• Type: Real-Time Adaptive Active Noise Cancellation (ANC)
• Noise Reduction Depth: Up to 55dB
• Noise Reduction Frequency Range: Up to 5,500Hz
• Noise Control Modes:
  • ANC On
  • Adaptive Mode
  • Transparency Mode
  • ANC Off

• 3-Mic AI Call Noise Cancellation

Connectivity

• Bluetooth Version: Bluetooth® 5.4 (Steady Connect)
• Bluetooth Codecs: LHDC 5.0, AAC, SBC
• Effective Range: Up to 10m
• Bluetooth Profiles: HFP/A2DP/AVRCP
• Google Fast Pair Support
• Dual-Device Connection

Battery & Charging

• Battery Capacity:

  • Earbuds: 62 mAh

  • Charging Case: 530 mAh

• Playback Time (AAC, 50% volume):

  • Earbuds: 11 hrs

  • Total (Earbuds + Case): 45 hrs

  • Earbuds: 6 hrs

  • Total (Earbuds + Case): 24 hrs

• Playback Time (LHDC, 50% volume):

  • Earbuds: 9 hrs

  • Total (Earbuds + Case): 37 hrs

  • Earbuds: 5.5 hrs

  • Total (Earbuds + Case): 22 hrs

• Talk Time (HFP, 50% volume):

  • Earbuds: 6 hrs

  • Total (Earbuds + Case): 24 hrs

• Fast Charging (AAC, 50% volume):

  • 10 mins charge → 3.5 hrs playback (Earbuds)

  • 10 mins charge → 11 hrs playback (Earbuds + Case)

• Full Charging Time:

  • Earbuds: ~50 mins

  • Earbuds + Case: ~80 mins

• Charging Interface: USB Type-C

Special Features

• OnePlus 3D Audio
• Sound Master EQ & Golden Sound
• 47ms Low Latency Mode
• AI Translation
• Voice Assistant Shortcut
• Find My Earbuds
• Double-Tap for Camera Control
• HeyMelody App Compatibility
• OTA Updates
• IP55 Dust & Water Resistance

Included Accessories

• OnePlus Buds 4 × 1 pair
• Charging Case × 1
• Type-C Charging Cable × 1
• Ear Tips (S, M, L; M pre-installed)
• User Manual & Safety/Warranty Guide