RIchard,
This is not the wand type you can stick in a bag of sand or soda, it is a tank type that you fill with soad, I would think you could use sand in it but the whole thing about soda is you do not need sweep it up as you do sand.
This is not the dry type system that David S. has, this works in conjunction with your pressure washer.
If I had a digatal camera I would post pictures of it, I will take a picture but need to shoot the whole roll of film so will be a few days.
This is like a new system since I did not even use a whole bag of soda with it. Case of the cart before the horse with me when I was still finding what I wanted to do in this business.
Comes with about 40 feet of feeder hose, the attachment, hopper which is on wheels.