Keypad

This is one way for customers to select their goods. They can just type in the number and the quantity of the goods that they want. It is a pretty normal way.

Voice Control

This is another way for customers to select their goods. We use voice sensor to detect the customers' voice and comparing with frequency of human voice. This way provide convenience to those customers who carry a lot of stuff and can not type through keypad. It is also convenience for disabled people.