The OnePlus Buds 4 True Wireless Earbuds deliver premium audio performance, advanced noise cancellation, and all-day comfort in a sleek, ergonomic design. Engineered with dual drivers — an 11 mm woofer and a 6 mm tweeter — each powered by independent DACs, these earbuds produce rich bass, detailed mids, and clear highs across a wide frequency range. They support Hi-Res Wireless Audio via LHDC 5.0 for high-resolution streaming on compatible Android devices. Adaptive Active Noise Cancellation (ANC) reduces ambient noise by up to 55 dB, helping you stay focused in loud environments, while Transparency Mode lets in sound when you need situational awareness. With Bluetooth 5.4 and Steady Connect technology, pairing is fast and the wireless connection remains stable up to 10 m. A triple-microphone array with AI noise reduction boosts call clarity and voice pickup. Enjoy flexible listening with up to 45 hours of total battery life with the charging case and up to 11 hours on a single charge. Fast charging provides up to 11 hours of playback from just 10 minutes of charging. Additional features like 3D Spatial Audio, Game Mode (low latency), and AI Translation enhance multimedia, gaming, and communication experiences. The earbuds are also rated IP55 for dust and water resistance, making them suitable for daily use and active lifestyles. Key Features Dual-driver system with 11 mm woofer and 6 mm tweeter for balanced, detailed sound Hi-Res Wireless Audio support via LHDC 5.0 Up to 55 dB Adaptive ANC with Transparency Mode Bluetooth 5.4 with Steady Connect for stable pairing Up to 45 h total battery life with charging case Fast charging: 10 min ≈ 11 h playback Triple-mic system with AI call noise reduction 3D Spatial Audio and personalized sound profiles Gaming Mode with low latency (≈ 47 ms) IP55 dust and water resistance Model: E513A