CS340iBT Qz Over-Ear Headset with Microphone and Remote Control, active noise cancellation, and excellent sound quality. Two microphones filter out up to 30 decibels of ambient noise. Bluetooth 5.0, active noise reduction, built-in controls for noise cancellation, volume, music, and calls. Over 22 hours of playtime with noise cancellation, over 30 hours with just Bluetooth. Two microphones with Clear Voice Capture, and the microphone can be folded away. With active noise cancellation, you can fully concentrate on your conversations and enjoy outstanding sound quality, even while listening to music during work. The CS340iBT features high-quality microphones. Dual Clear Voice Capture microphones use algorithms to recognize and isolate your voice. The longer you speak, the better they perform, enhancing both clarity and quality. Overall, the microphones can filter out up to 30 decibels of ambient noise.