This is OnePlus Buds 4, the successor to the popular Buds 3. These earbuds are designed to offer flagship-level audio features at a mid-range price point.
They feature a dual-driver system (typically an 11mm woofer and a 6mm tweeter) combined with dual DACs. This setup allows for deep bass and clear trebles.
Supports the LHDC 5.0 codec, which allows for near-lossless audio streaming at up to 24-bit/192 kHz (when paired with compatible devices).
Features advanced Adaptive ANC (Active Noise Cancellation) that can reduce ambient noise by up to 55dB. It also includes an "Adaptive Mode" that automatically switches between ANC and Transparency depending on your surroundings.
Offers roughly 5–6 hours of playback with ANC on, and up to 45 hours total including the charging case. A quick 10-minute charge provides about 3.5 hours of listening time.