Features:
The power bank is made of high quality material, very durable.
4000mAh large capacity: premium Li-ion battery cells add an extra 4000mAh to the battery life of your smartphone, tablet or digitalcamera.
2-ports: DC5V/1A + DC5V/2.1A, convenient to use.
Slight shake to display the power.
Dual-output, charge two mobile devices simultaneously.
Simple design: connection ports are located on one end of the power bank.
With battery power display, convenient to use.