This is Apple Power bank casing. You can use 6cells of 18650 to make a power bank with apple port. This power bank casing has two USB port, 1 type B port, 1 type C port, 1 Apple lighting port. Switch is available and special display to check battery capacity. In the display you get details about the battery capacity in % form, Charging of or off, discharging on or off. You can use 2500mah cells to make a power bank of 15000mah. You get fast charging with 5volt 2amps. 
 
Package Include -
1 x Power bank case 
1 x Circuit Unit (if select)