The SmartLetterBox is a very useful gadget for homes and offices etc. The main advantage of the SmartLetterBox is we can find out the presence and absence of letter inside the box without opening the box. This system is basically developing for an organization, for sending and receiving letters within organization and outside of the firm, easily and in proper manner. Avoiding delay in letter delivery and tracking the system of letter box. It mainly designed for getting notification of gathered letters.
Also it works with coordination, software and hardware.