It sounds similar to the "Multifunction Water Scale" or to you amd me
a spirit level, that my dear wife bought me a few months ago from
LIDL.

Its in essence a 80cm spirit level, that apears to be robust and quite
heavy. It has 3 spirit level philes set at horizontal, 1.5:100 and
3.5:100

It also has a vertical spirit level on one end.

On the other end it also has a vertical spirit level that rotates with
a 600mm long arm, that you can use like a variable square. Not sure
what for thou.

No instuctions, only picture on the box that shows a kitchen, a
bathroom and some ceramiv tiles.

The strange thing is that the 600mm long arm also has a small vertical
and a horizontal spirit phile. It also has a line a 6 holes approx 4mm
dia that are spaced apart 72mm 72mm 100mm 72mm and I guess 72mm
(because one of the spirit philes is cut straight thru the printed
distance.

Within the main spirit level there are 2 dog bone shaped cutouts, no
problem, its where you would pick it up. But there are 2 funny shaped
plastic indictors that are clipped in for safe keeping. These plastic
bits slide up and down the 600mm arm.

Does any one have any instructions as it does seem far to complicated.

I think I might use it for bricklaying, and accidently hit it with a
mallet, and tell the wife off for buying it.