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. Approximate Size: 8″ W x 6 1/2″ H x 2 7/8″ D, Imprint Area: 1 3/4″ W x 1 3/4″ H