Alfac Obviously so it comes loose when you try to screw it into the wood rather than when you try to reverse it, which you generally will not: Interesting idea, but useless in reality.

Alfac The link at the bottom of the page that says contact us would be a starting place do you not think???

Alfac Because these makers invent this mystical Vf unit that defies normal voltage measurement. There's another identical saw claims 88V, but again the product says Vf: market wanketeering at its best.

Alfac Drawing is registered on the piece of paper you trace the image on to. If it was the price of a magic slate, you could expect that functionality.

Alfac If you look at the top of the page, it tells you how much the item is. It is a common concept that items are priced on the page you scrolled past, so should not be hard to work out.

Alfac You put a piece of paper on it and it lights it up so you can put another piece of paper over it to trace the image with a pen or pencil. Auto save to the paper is enabled...

Alfac It automatically 'saves' onto the piece of paper you draw it on to. Think back to drawing with pencils at school.

Alfac No. Sensors need to match unit