... OEM/ODM CE FCC ROHS Wireless profession mini speaker with power bank for emegency Specifications Brand nameDenkoModel NumberMP-03Capacity3.7 V ... your electronics, after that joint the USB connector of this music power,then It will start charging 3,you can also use ... shut down automatically in 60 seconds when you stop the music CE,ROHS,FCC Certification:China Souring Fair: Electronics & Components at ...