Access control and alarm monitoring systems; Closed circuit TV systems for security and surveillance, namely, cameras, switchers, monitors, microphones, and recorders; Computer hardware, namely, wireless network repeaters; MP4 players; Portable radios; Portable wrist-mounted digital electronic device for audio recording and audio playback; Speaker microphones; Telecommunications equipment, namely, fiber-optic transceivers, fiber optic repeaters, converters and optimizers, wave division multip...