Electrically operated master control units, braking systems, collision avoidance systems comprised of laser sensors and alarm units and related operating software sold as a unit for use in the materials handling industry; vehicle collision avoidance systems comprised of short range communications modules and smart antennas; computer hardware, namely, wireless modules; Wireless transmitters and receivers; RAMP (range amplified multipoint) modules, namely, transceivers for wireless communication and data transfer; antennas; power chargers for mobile electronics; battery components, namely, connectors, terminals, leads, vent caps, connector clamps, battery boxes and expandable rack components for batteries; splitters and couplers for antenna systems; Computer electrical and electronic asset tracking devices, namely, position tracking devices; radio remote control systems for controlling machines, equipment and vehicles comprised of remote control units, digital signal and data processing software; Video systems consisting of video cameras, monitors, recorders and video transmission apparatus; underground communications systems, namely, consisting of video cameras, monitors, recorders and video transmission apparatus; Apparatus for converting thermal energy to electrical energy, namely, thermoelectric converters; thermoelectric assemblies, namely, apparatus for the conversion of electrical energy to cool, heat or temperature stabilize electronics or enclosures; thermoelectric modules, namely, semiconductor-based devices for the conversion of electrical energy to cool, heat or temperature stabilize electronics; heat exchangers not being parts of machines, namely, recirculating liquid to air heat exchangers; electrical contacts for electronic devices, namely, ferrite contacts, ferrite power filters, ferrite signal filters, ferrite noise suppressors; ferrite chip beads