Features High Definition Bluetooth® 4.1 Wireless Technology And Built-In Microphone. Simply Pair Your Handheld Device To Enjoy Dynamic Stereo Sound Or Receive Hands-Free Calls. Interchangeable Earbud Covers. Earbuds Include 55 mAh Battery. Pairs From Up To 30 Feet Away. Up To 3 Hours Of Play Time. Store Earbuds In Power Bank’s Magnetic Charging Cradle. 2200 mAh Lithium Ion Grade A Non-Recycled Battery. LED Indicator Lights. Features A USB Output And Micro USB Input (Cord Included). Power Bank Output: 5 Volts/1 Amp. Works With Most Smart Phones And Audio Devices. Requires Your Phone’s Charging Cord To Charge Your Device. 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.. Power Bank Has Been Tested to UL 2056.