Masterlan tester MT-001-MS is used to check the correct connection of individual wires and their positions. This model does not test cable wires in pairs, but each wire separately = ie. if only the white-orange wire is damaged, the meter will show the functionality of all wires except the white-orange wire.
The package contains the main part of the tester + the end element. The package does not contain the 9V battery, which is needed to power the main part.