The e-mail box is designed for the installation of residential buildings. The peculiarity of these mailboxes is simplicity and usability.
Materials of execution and configuration can be made according to an individual design project

Principle of operation :
Bring an RFID tag from the front door or enter an individual password
The cell will open automatically

Diode sensors can be installed in each cell which will determine whether the correlation has come to the cell and an LED will be installed opposite each cell indicating the state of the cell – busy or free.

Link: https://violanta.com/ru/pochtovye-yashchiki/elektronnye/electronic-mailbox-cn-18 

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