This keyboard has 16 keys arranged in a 4x4 grid for phone lines and connected into a matrix controlled by 8 microcontroller pins.
This small and compact 4x4 keypad module is easy and convenient to carry, and the contact resistance (<100 ohms) makes it comfortable and soft to the touch.
AZ-Delivery 16-switch keypad module is easy to install thanks to four mounting holes on each corner.
Note: Light shooting and different displays may cause the color of the item in the picture to be slightly different from reality. The allowable measurement error is 1 ± cm.