TOOLCRAFT 2331524 Notice D'emploi page 56

C The symbol displayed here indicates the type of object detected. In non-metal
detection mode, a distinction can be made between the following types of
material:
Wood
Small steel object
Longer steel object (e.g. frame profile in a plasterboard wall)
Copper cable
The device does not distinguish between cables (copper) and
small steel objects
D Live AC cable
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