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. Approximate Size: 3 1/2″ W x 1 1/2″ H x 7/8″ D, Imprint Area: Silk-Screen: 3″ W x 5/8″ H … Optional Laser Engraved: 3″ W x 1/2″ H