Featuresr the power bank is made of high quality material very durabler 4000mah large capacity premium li ion battery cells add an extra 4000mah to the battery life of your smartphone tablet or digitalcamerar 2 ports dc5v1a dc5v21a convenient to user slight shake to display the powerr dual output charge two mobile devices simultaneouslyr simple design connection ports are located on one end of the power bankr with battery power display convenient to use