This 4x4 keypad module has a total 16 different  push button keys and comes in 4x4 matrix. The keypad comes in stripped form connectors which can directly be attached to the respective microcontroller development board.

4x4 keypad Specifications:

• 4 x 4 Matrix Microswitch Push Button Keypad
• 8 pin configuration
• Operation Temperature: -20 to 80 centigrade
• A Female 10-pin berg strip connector is required for interfacing it with your microcontroller circuits.

4x4 Keypad Applications:

• Hobby Projects
• Security systems
• Measurement Instruments
• Vending machines
• Industrial machines
• Data entry for Embedded Systems