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 | Protective Plastic Travel Case | Hands-Free Design | Press +/- Buttons To Advance Through Selections And Hold Down To Change Volume | 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: 4 1/4″ H x 1 1/4″ Diameter , Imprint Area: 1 3/4″ W x 5/8″ H