Bar code readers; Cables, electric; Cell phone covers; [ Computer monitors; Couplings, electric; ] Electric sockets; Fuse wire; [ Horns for loudspeakers; ] Interfaces for computers; Light emitting diodes (LEDs); Printed circuit boards (PCBs); Resistances, electric; Switches, electric; Telephone wires; Transistors; Triodes; USB cables for cellphones; USB card readers; Wires, electric