The W820NB headphones feature Hybrid ANC technology that reduces noise by up to 38 dB. This enhances your music listening experience and cuts out unwanted noise. The W820NB headphones are equipped with a long-lasting battery that is efficient and gives you 49 hours of playback time. The ergonomic design makes it comfortable enough for all-day use. Stylish an appearance that stands out and suits any personality. The W820NB headphones have been approved by JAS and are fully equipped with Hi-Res audio standards. Featuring a large dynamic membrane driver, the W820NB headphones produce crystal clear, detailed sound. The W820NB headphones are equipped with voice call NC technology, giving you natural conversations that are smooth and complete. You can personalise the W820NB Bluetooth headphones with the Edifier Connect app to change the mode, check the battery status and view the user manual. Switch to Ambient mode and pay attention to your surroundings while listening to your music. Listen to airport announcements or important notifications without taking off the headphones. In gaming mode, the latency is only 80 ms and there is perfect synchronisation between sound and picture. This makes for a perfect gaming experience that leaves you wanting more.