Protective Plastic Travel Case | Featuring Bluetooth® 4.2 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 Design | Press +/- Buttons To Advance Through Selections And Hold Down To Change Volume | Works With Most Audio Devices | Pairs From Up To 30 Feet Away | 55 mAh Battery (Charging Cord Included) | Up To 2 ½ Hours Of Play Time, Up To 1 ½ Hours of Talk Time | 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.. Approximate Size: 2 3/4″ W x 2 3/4″ H x 1 1/2″ D, Imprint Area: 2 1/4″ Diameter