B&W PI5 true wire-free headphones are attractive, well-built, and they deliver a refined sound quality. Featuring Bluetooth 5.0 with Qualcomm aptX technology these earphones ensure reliable connectivity whether you are streaming from your smartphone, tablet or PC. Allows connection of up to two devices at the same time, however, only one device can be used to play or make a call at a time. Download the Bowers & Wilkins free headphone app, available for Apple and Android for further control of the sound and noise cancellation, right on your phone. The PI5 headphones feature the latest innovations in adaptive noise cancellation along with 4 built-in microphones that pick up ambient noise and cancel it with an equal, but opposite, audio signal and enhance the call quality. There are three levels of Adaptive Noise Cancellation ~ High, Low and Auto, that can be controlled either by the multi-functional button on the left earbud or via the app. Similarly, the touch-sensitive button on the right earbud allows you to enable voice assistance. The buttons also allows you to control playback and phone call functions with single (play/pause, answer call), double (skip forward, end call), or triple presses (skip backward). Another stand-out feature of these headphones is the intuitive detection sensors that put the earphones on standby or reconnect them depending upon whether they are removed or put back on. The PI5s come with a sturdy and attractive charging case for charging the earbuds when not in use. The case is equipped with two 350mAh rechargeable batteries. Each earbud has a rechargeable battery which provides up to 4 hours of wireless playback. Including the charging case, the PI5 can provide up to 12 hours of continuous playback.