[High Sound Quality] Equipped with a large 1.6 inch (40 mm) mantle plated composite diaphragm sound-pronounced unit that supports LDAC decoding and high resolution, giving you more music details. Transfer speed comparison: LDAC 990Kbps, Qualcomm aptX HD 576Kbps, AAC 512Kbps, SBC 328Kbps. [-43dB Hybrid Active Noise Cancellation] With the hybrid ANC technology and enclosed design, the headphones will automatically identify ambient noise and transmit the corrected signals. Allows you to enjoy quiet music time in your commute, office, home, or travel. [Zero Pressure Patent Earcups] The new improved W820NB Plus headphones weigh only 7.9 oz (220 g), and adopts a memory foam cushion material with zero pressure sensation patented technology that gives you a super comfortable wearing experience even with glasses. [Perfect for Hands-Free Calls] Built-in Mics with DNN (deep neural network) noise cancellation for crystal clear calls. [Ambient Sound] Supports 7 levels of ambient sound volume, allowing you to hear outside sound more clearly when you need it. No worry about missing important information, nor the bus or airport broadcasts, vehicle reminders, etc. [49-Hour Playback Time] A full charge will give you 49 hours of playback time while a quick 10-minute fast charge will give you 7 hours of non-stop use. [Warranty] This product comes with a one-year warranty, guaranteeing the performance and providing you with reliable support.