wire and wireless communication devices, namely, attenuators; RF (radio frequency) detectors; DC blocks; attenuator pads; co-axial terminations; bridges; calibrated mismatches; power dividers; electrical switches; impedance matching pads; electrical transformers; installer meters; combination leakage detectors and signal level meters; electrical cables; mobile mounts; temperature probes; battery packs; battery chargers; cigarette lighter adapter cords; leakage detectors; leakage measurement instruments; radio receivers; channel tagging instruments; CATV system calibrators; field probes; antennas; frequency counters; carrying cases; power meters; laser light sources; electrical adaptors; electrical adaptor caps; mating sleeves; patch cords; reverse path test instruments; reverse path analyzers; electrical interfaces; fixed and tunable filters; preamplifiers; power line interference locator systems; sweep generators; distribution amplifiers; switch controllers; power cubes; ;power supplies; rack mounting trays; contact closure sources; signal sources; terminators; character generators; rack mount card cages; radio transmitters; demodulators; encoders; decoders; switchbank card cages; control cards; contact closure cards; tuning cards; decoder boards; multiplexers; batteries; belts and holsters; and user's manuals sold as a component of some but not all of the above goods