The code lock is implemented on the basis of microcontroller PIC16F628A / PIC16F648A / by Microchip. 
It has the following features: 
- Two zones: Zone 1 - door sensor and TMP zone - 24 hours to protect the wires and the system itself. 
- Button to open the door from the inside. 
- Two four-digit codes: Custom - for opening and closing (depending on the function selected) of the door and engineering - for programming. 
- Change the mode of operation of the code lock, user and engineering code. 
- Unlock Time: 5, 10 seconds and remains unlocked until code is entered. 
- Time to lock when 3 wrong codes are entered: 30, 60 seconds and without blocking. 
- Sound and light indication. 
- 12-button keyboard. 
The PCB is 74 x 52mm in size. 

This product is an assembled module. 

The appearance may differ from the one in the photo without changing the parameters of the product (This means that there may be a difference in the elements used (appearance, placement, color, shape or value)).