An optical communication apparatus performs wavelength division multiplexing with respect to signals of a plurality of signal transmission bands. In various embodiments, the apparatus comprises at least one label that, when affixed to a main body portion of an object to be identified, creates a distinctive, identifying feature. A locking device in the inner nozzle section is operable to selectively stop movement of the strand material. The torque-limiting device may be disposable, reusable, economical, and have high torque capabilities. The dynamic version of display runs on portable devices with Global Positioning System will show optimal RPM and shift indicator continuously.