Hybrid Active Noise Cancelling: Two external and two internal microphones combine to detect and effectively reduce up to 90% of outside noise, including that from automobile engines and airplanes. Experience Detailed Audio Immersion: The oversized 40mm dynamic drivers in the noise-canceling headphones use BassUp technology to create thumping beats and detailed sound. For further information, use the AUX cable to connect to Hi-Res certified audio. 40-Hour Long Battery Life and Quick Charging: You can use your Bluetooth headphones on your commute without worrying about charging because they have a 40-hour battery life when ANC is turned on and a 60-hour battery life when in regular mode. For an additional four hours of playtime, fast charge for five minutes. Dual-Connections: Use Bluetooth 5.0 to connect to two devices at once and