From Diamond Select Toys 2018:

Star Trek Classic Phaser

CLASSIC
COMMUNICATOR
Starfleet communicators are designed for
communication between landing parties
and ships in orbit. Using subspace
frequencies, it can also be used to send a
homing signal, as well as provide a
transporter lock.

Trek Tek action replicas are full scale toys
modeled direct from original STAR TREK props for
maximum authenticity.