High-Resolution Audio for uncompromised sound
Experience digital music to the fullest with High-Resolution Audio. By capturing music at a higher rate than CD, increasing both audio samples per second and the bit-rate accuracy of each sample, High-Resolution Audio offers an uncompromised rendition of an artist's music. Savor every breath and subtle movement for a truly emotional experience.
LDAC: for the transmission of High-Resolution Audio content
LDAC supports several transmission rates according to your wireless environment. It allows you to enjoy High-Resolution Audio content in exceptional sound quality near to High Resolution Audio, by transmitting at the maximum transfer rate: 990 kbps (approximately three times more data than conventional Bluetooth audio). LDAC provides an enhanced wireless listening experience for all your music, the way the artist truly intended.
One-touch NFC for instant connectivity
Near Field Communication (NFC) and Bluetooth® technology remove the need for wired connections and complex set-up sequences. Simply touch your NFC-enabled device to the headphones for a quick, seamless connection, then start streaming your music collection. No NFC? No problem. Connect via Bluetooth and you’re ready to go.
Listen for longer with up to 7.5 hours battery life
Perfect for commuting or when you want to enjoy your music all day, when fully charged you can enjoy up to 7.5 hours of music play time or talk time. You can carry on listening even when the battery runs out too, by simply plugging in the supplied headphone cable.
Clear hands-free calling
A built-in microphone and HD voice support enables you to conduct crisp, clear hands-free calls.
http://www.sony.com.au/electronics/in-ear-headphones/mdr-ex7…
It looks way too bulky.