Features High Definition 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. LED Indicator Lights. Works With Most Audio Devices. Hands-Free Design. Press Earbuds To Advance Through Selections And Answer/End Calls. Store Earbuds In Magnetic Charging Base. Features A Micro-USB (Cord Included). Pairs From Up To 30 Feet Away. 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.