Features High Definition Bluetooth 4.1 Wireless Technology And Built-In Microphone With Volume Control. Simply Pair With Your Device To Enjoy Dynamic Stereo Sound Or Receive Hands-Free Calls. Red LED Indicator Light. Interchangeable Earbud Covers. Works With Most Audio Devices. Hands-Free Design. Press Earbuds To Advance Through Selections. Store Earbuds In Magnetic Charging Cradle (Micro USB Cable Included). Pairs From Up To 30 Feet Away. 40 mAh Battery. Up To 1 Hour 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.