How should I handle “how to inspect Dual Battery Isolator” when shopping for “Dual Battery Isolator”?

Inspect “Dual Battery Isolator” before installation: compare the label, connectors, dimensions, mounting points, and included hardware with the removed component. For safety-related work, check open recalls through NHTSA and follow the manufacturer procedure or use a qualified technician. End with a go / no-go rule the reader can apply without jargon.