Creative WP-350 Wireless Bluetooth Headphones with Invisible Mic A concealed microphone lets you enjoy crystal-clear phone calls without a cumbersome boom getting in your way Easily connect via Bluetooth to compatible stereo mobile devices and experience wireless freedom from up to 10 meters Features apt-X technology that ensures audio content transmitted over Bluetooth is instant and crystal-clear Precisely tuned Neodymium drivers offer superb audio for your music and movie entertainment while delivering accurate voice calls Instant access to call and playback controls plus volume level buttons make adjustments a breeze