Features High Definition Bluetooth® 4.1 Wireless Technology And Built-In Microphones | Simply Pair Your Handheld Device To Enjoy Dynamic Stereo Sound Or Receive Hands-Free Calls | Interchangeable Earbud Covers | Earbuds Include 40 mAh Battery | Store Earbuds In Magnetic Charging Cradle | 230 mAh Lithium Ion Grade A Non-Recycled Battery | LED Indicator Lights | Features A Micro USB Input (Cord Included) | Charging Cradle Output 5 Volts/1 Amp | Works With Most Audio Devices | Pairs From Up To 30 Feet Away | Up To 3 Hours Of Play 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: 3 3/4″ W x 3/4″ H x 3/4″ D, Imprint Area: 2 1/2″ W x 3/8″ H