Edifier W820NB Active Noise Cancelling Wireless Bluetooth Headphones - Black Superb Noise Cancelling The W820NB headphones have hybrid ANC technology that reduces noise by up to 38dB. This amplifies your music listening experience while cutting out unwanted noise. Long-Lasting Battery The W820NB headphones are complete with a long-lasting battery that's efficient and gives you 49 hours of playback time. Lightweight Design The ergonomic design makes it comfortable enough for all-day use. Stylish an appearance that's eye-catching and suits every personality. Hi-Res Certified The W820NB headphones have been approved by JAS and are complete with Hi-Res Audio Standards. The W820NB headphones are built with a large dynamic diaphragm driver and produce crystal clear sound that's rich in details. Clearer Phone Calls The W820NB headphones are equipped with voice call NC technology and enable you to have natural conversations that are smooth and complete. Edifier Connect App You can personalize the W820NB Bluetooth headphones with the Edifier Connect app for changing modes, checking battery status, and viewing the user manual. Ambient Sound Mode Switch to ambient mode and stay alert to your surroundings while listening to your music. Hear airport announcements or important notifications without taking your headphones off. Low Latency in Game Mode While in Game Mode, the latency is as low as 80ms and there's perfect synchronization between sound and images. This ensures a perfect gaming experience that will leave the player wanting more.