Paper Design and Interface of Device

Here is just a brief idea of what I think the device should look like. I will produce a clearer version in my next post when I finally get Visio. Its in the design process at the moment, I'll get the measurements etc in the next post.
For a start I have designed the menus, here is a step by step approach in using the device menus:

step 1 - there is start screen saying "Please Insert Store Card"

step 2 - once inserted the device displays the persons name from the store card and asks "Confirm" or "Cancel"

step 3 - once confirmed we have the main image right of us- it will also have the person name on there somewhere

step 4 - when the person wants to search, they touch the search button (touch screen) then a new menu pops up with a big simple keyboard on screen and the search field, the person types in whatever they look for and press return

step 5 - results are displayed and recommendations, then when the person clicks on a certain food, the info section changes accordingly - gives the price etc

step 6 - then they press the add button to add it to shopping list

step 7 - any updates/changes to shopping list will be noted by having different background colors depending on what was changed, so if new item added, it will highlight it green for a bit

step 8 - the person can press "begin route" then this produces an updated route and begins the direction giving - you might be thinking where are there directions on the screen? they will be at the forefront of the menu, making the back menu slightly transparent and giving a more stronger color to directions and instructions it provides - so imagine seeing a red arrow pointing forward and below it "6 meters"

step 9 - if the person see's another item they want on the shelf, they simply press stop on the screen and drop the item in the trolley, the rfid trolley readers scan the product and automatically add it to shopping list and total price....

step -10 the person can then press begin route again, which recalculates any changes and continues as step 8

step 11 - once the person has finsihed shopping, they can walk through the checkouts which will uatomatically ask the person to confirm the goods they have brought and the amount the have to pay, so "Pay" ->> "Confirm Amount" ->>>>"Thank you for shopping at ...."

step 12 - person then removes their shopping and leaves the trolley and device in-store