Sony H.ear in Wireless Headphone, Black (MDREX750BT/B) Go wire free with Bluetooth and NFC, High-Resolution Audio support for uncompromising sound via wired listening.Connectivity Technology: Wireless Listen longer with up to 7.5 hours battery life, In-ear comfort and style, Lightweight, behind-the-neck design Clear hands-free calling via Bluetooth, Wide frequency response for pure audio, Enjoy higher quality Bluetooth streaming with LDAC