Headphone Jacks Will Soon Become A Thing Of The Past. Be Prepared With Wireless Headphones!. Features High Definition Bluetooth® 4.1 Wireless Technology And Built-In Microphone With Volume Control. Simply Pair Your Device To Enjoy Dynamic Stereo Sound Or Receive Hands-Free Calls. LED Indicator Light. Press +/- Buttons To Advance Through Selections And Hold Down To Change Volume. Works With Most Audio Devices. Headband Extends From 7" x 8". Zippered Closure Travel Case Featuring Removable Zippered Mesh Cord Pocket. Pairs From Up To 30 Feet Away. Charging / Audio I/O Cord Included. 340 mAh Battery. Up To 10 Hours Of Play Time.