This is what your product should look like and the diagram below shows the different buttons/ports and what they are for -

1.            LCD Display
2.            Power button
3.            USB port - 5V-2,4A
4.            USB port Qualcomm® Quick Charge™ 3.0
5.            Micro/USB input socket for recharging
6.            ON/OFF Switch
7.            Battery clamps with Smart cable
8.            Output socket for Smart cable
9.            LED light