Receiver
A receiver was an electronic device which received and converted a signal into sound or vision.

In the 32nd century, in the case of Grudge becoming lost, Cleveland Booker installed a tracker in her collar. Using his receiver, Booker could locate his cat by homing in on the tracker's signal. In 3189, Michael Burnham reverse-engineered the collar to find Booker on Hunhau. ()

In 3188, when examining a console on Booker's ship, Burnham recognized a receiver, along with other communications technology. ()

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Communications technology