Digital noise cancelling headphones with Smart Listening technology all in a true wireless design. With Smart Listening features that optimize your sound based on your activities and surroundings, you will only hear what you need to. Escape the Noise with Industry-leading Noise Cancellation Listen free from wires and unwanted noise with Industry-leading Noise Cancellation. Smart Listening by Adaptive Sound Control Automatically detects your activity, whether you’re travelling in an airport, walking on a crowded street, or sitting in a quiet area. Be immersed yet aware with Ambient Sound Mode Adjust Ambient Sound with the Sony | Headphones Connect app to hear essential sounds like traffic or announcements, even when you’re listening on the move. Sony | Headphones Connect app for Android /iOS to control your sound settings. Download the Android or iOS app to use Smart Listening by Smart Auto-settings, control your ambient sound settings and adjust the sound levels with the Equalizer. True wireless design Compact, minimalist design. Just your music, with no wires to get in the way. Built to stay put and keep playing An ergonomic ear hook keeps your headphones in place, and the internal antenna and fitting supporter keep the signal strong for constant streaming. Small but perfectly clear A 6mm driver sits inside the headphones to deliver clear sound. 9 hrs battery life with quick charge Enjoy up to 9 hours of battery life with the chargeable carrying case. 3 hours of music playback per charge and 15 minutes quick charge for 75 minutes of listening. Hard carrying case with built-in battery No need to worry about battery life, just place your headphones in the carrying case to charge on the go.... More