With its 6mm driver, unique acoustic structure, and industry-leading active noise cancellation, the AZ40M2 offers a clear sound advantage. Seamless switching between devices, top-notch call quality, convenient use of a single earbud, as well as easy sound control and long battery life. The flat design and optimized ergonomic fit ensure all-day comfort and are balanced so that nothing slips. The unique Technics acoustic technology delivers a detailed, rich, and exhilarating sound experience. The EAH-AZ40M2 lasts 7 hours on a single charge (24 hours with the charging case) and 5.5 hours with active noise cancellation (18 hours with the charging case). The Technics Audio Connect app makes it easy to configure and control the EAH-AZ40M2, offering compatibility with voice assistants and the ability to customize sound mode settings.