Fast charging 
USB B, C, Apple Port charging
on/off switch
Display Board to show battery capacity
Dual USB Output
 
Its a QUICK CHARGE power bank Module or circuit board. Its support 18650 cells of lithium ion battery. Just like a modern power bank, the module is equipped with Dual USB output to charge the gadgets at 2.4A and 1A. To charge the batteries, this module has two USB inputs one is C-type input, and the other is a MicroUSB input. Onboard, a brilliant blue-coloured illuminating LED Display displays the real-time battery percentage in the 0–100% range, as well as the IN and OUT Signal. Furthermore, the board contains a connection for installing an LED to be used as a flashlight, which is generally found on a POWER BANK.
Power bank module dimesion provides in the Pic, 
 
Package Incldue -
1 x power bank module