16 Button 4x4 keypad matrix

This listing is for a 4x4 16 button keypad matrix
The colour is actually a cool black, rather than the green shown in the picture. The buttons are denoted by numbers and letters: 0,1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E ,F, and the pins are labeled 0-7. If you do not know how a keypad matrix works, google "keypad matrix". I took the time to reverse engineer the pinout, as seen in the second image. They did not initially come to us with a pinout. Keypad matrix' all work the same anyway. If you look closely, you will see a pattern in how this keypad matrix works. It will work nicely with the LS7222 programmable COMBINATION LOCK IC that I sell in my store. This can fit directly into a breadboard, or is easily soldered to a PCB. If you have any questions, please let me know.
Size: 55mm x 36mm x 8mm