Passive shielding

Passive shielding concerns physical barriers rather than intentional interference transmissions. Compare the exact item, fit, closure, material and a relevant test report. A photograph or material name does not establish attenuation. An empty category does not imply that verified stock is available. Eligibility is assessed per entry. A catalogue category does not establish product approval, independent testing or permission to operate. Passive barriers and signal observation must be distinguished from intentional radio interference.