" The ZM1 measures the impedance of loudspeakers and entire distributed loudspeaker systems as well as individual components (resistors, capacitors, inductors). It will also calculate the wattage that will be produced on an installed loudspeaker system.

These are rugged hand held battery powered instruments with special circuitry to prolong battery life. They come complete with high quality test leads. "


Bought in a job lot

Turns on fine and switches work, however is untested professionally

in very good physical condition

may need calibrating

Comes in orginal box, albiet with writing from previous owners