Factual error: When they are running the disc from Donahue's office, the technician takes the radio to transmit their exact location. But at the beginning of the movie, they "lose transmission in the vault." There's no way a radio would work in that room.
STXJJ
18th Mar 2014
Eraser (1996)
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Suggested correction: The video transmitter is low power (likely under 1 watt, and possibly also in the microwave frequencies) whereas the 2-way commercial radio is much higher power, in the UHF or VHF bands, with a system that is designed to minimize dead spots in the building, likely using a repeater system to boost the coverage.