Protective Round Zippered Travel Case With Mesh Pocket | Featuring Bluetooth® 4.1 Wireless Technology And Built-In Microphone With Volume Control | Simply Pair With Your Device To Enjoy Dynamic Stereo Sound Or Receive Hands-Free Calls | Hands-Free Double Earplug Design That Fits Comfortably Over The Ears | Press +/- Buttons To Advance Through Selections And Hold Down To Change Volume | Works With Most Audio Devices | Pairs From Up To 30 Feet Away | Charging Cord Included | The Bluetooth® word mark and logos are registered trademarks owned by the Bluetooth SIG, Inc. and any use of such marks by Promoful®, Inc. is under license. Other trademarks and trade names are those of their respective owners.