Extended Product

All simple products(including configurable children products) can be extended by clicking "Properties" at backend:
Mtn Pos Backend Extended Product

Then all properties and proterty groupings will be shown:
Mtn Pos Backend Extended Product Properties

When editing a property:
Mtn Pos Backend Extended Product Edit Property

After all done. When tap a extended product at iPad, a options window will be shown:
Mtnpos Extended Product On Ipad