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 Hit Promotional Products®, Inc. is under license. Other trademarks and trade names are those of their respective owners.