This week we further improved our proposal. We considered the details of the device, like the functions of the 3 buttons and what material of the product should be made of. Also did some research of the marketing, and assumed a sales strategy. In this process, I realized how important it is to make a detailed plan because I found there are too much things to do for a such a simple product. And also the presentation skill is very significant, the ability of express our idea clearly is also a big part of the project.