Hybrid Active Noise Cancelling. The UGREEN HiTune X6 hybrid active noise cancelling wireless earbuds are equipped with a feed-forward and feedback microphone to dynamically block out unwanted external low-frequency noise up to 95% (35-40dB). Perfect for airplane travel, commuting, in the office, etc. Gives you more peace & quiet. Incredible Sound Powered By DLC Speaker, Driven by a 10mm Diamond-Like Carbon Speaker unit, our UGREEN HiTune X6 noise cancelling earbuds feature outstanding extension and sensitivity in sound, bringing you extra bass, pristine low mids, and crisp treble. ENC for Clear Call with a dual-mic in each earbud to capture your voice accurately and help reduce the surrongding noise to enhance the performance and let people on the other end hear you more clearly. Enjoy All-day's Play with 6 hours playtime per charge and 10 mins fast charging, the UGREEN Hitune X6 wireless earbuds extend your enjoyment up to 26 hours in total. Just Fit, No more worrying about your earbuds falling out! Ergonomically designed and ultra lightweight ensure perfect fitting for long-time.