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.