The Sony XBA-BT75 Balanced Armature Bluetooth Wireless Headphones feature Sony's single Armature full range driver. This Japanese manufactured driver technology delivers outstanding audio clarity and profound vocals. The XBA-BT75 will pair with any Bluetooth phone or portable player device, delivering the convenience and freedom of wireless operation without sacrificing audio quality. The headphones feature an inline remote control and omnidirectional microphone, establishing level control and phone communication. A rechargeable lithium ion battery powers the headphones for up to 3.5 hours (continuous music and communication). The headphones enclosure features a double-layered housing resulting in impressive noise isolation.