The W820NB Plus Wireless Over-Ear Headphones deliver immersive sound with Hi-Res Audio and Hi-Res Audio Wireless certification, featuring a 40mm dynamic driver with a Titanium-coated composite diaphragm and LDAC codec. Enjoy up to 49 hours of continuous playback with ANC off, and benefit from upgraded noise cancellation technology for deeper ANC and an Ambient Mode for environmental awareness. Experience crystal-clear call quality with DNN noise cancellation technology. These headphones can also be used as wired headphones via USB cable when connected to a PC. With Game Mode offering low latency of just 0.08s, enjoy a seamless gaming experience.