EDIFIER TW330NB Wireless Active Noise Canceling Bluetooth 5.0 Earphones Earbuds - Microphone, AI Noise Cancellation, 20hr, Quick Charge, BlackEdifier TW330NB Wireless Active Noise Canceling Bluetooth 5. 0 Earbuds Hybrid Active Noise Cancelling Technology This 2021 new wireless earbuds adopts upgraded hybrid ANC technology. The internal and external bidirectional microphones respectively pick up the internal and external ambient noise of the ear in order to generate a reverse sound wave to cancel out the noise. This creates a new depth noise reduction of 38dB, so the external world is