These wireless headphones feature a maximum audio resolution in the signature Sennheiser sound with a 42 mm audiophile-inspired transducer system, aptX Adaptive, and Bluetooth. Sound personalization is possible through the Sennheiser Smart Control App with an integrated equalizer, presets, and sound modes. The headphones also come with adaptive noise cancellation. However, ambient sounds can still be perceived with the adjustable transparency mode. They have a lightweight, foldable design with a padded headband and ear cushions for lasting comfort and up to 60 hours of battery life.