In-ear headphones deliver exceptional sound quality Bluetooth connectivity enables easy wireless connection to compatible devices Active noise cancelling technology lets you block out ambient noise and focus on the audio Built-in microphones offer ultra-clear voice pickup Ambient Sound mode lets you capture more of the ambient sound around you, so you can enjoy a natural listening experience while staying connected to the environment Pair up to two Bluetooth headphones at the same time Pocket-sized case Enjoy up to 15 hours of listening thanks to the handy charging case Easy hands-free calling IPX4 splash and sweat-proof Change your music to fit your taste with EQ settings on the Sony Headphones Connect app The Digital Sound Enhancement Engine (DSEE) and Sony’s unique 5mm driver reproduce your music with beautifully authentic vocals and surprisingly powerful bass