The Realistic TRC-56 was Radio Shack’s version of the “telephone” CB radio. It’s primary competitors were the Johnson Messenger 130/130A and the Midland 13-884. This Realistic CB-Fone 23 was a full-featured mobile unit with Delta Tune, noise blanker, and a large lighted S/RF meter. If the telephone handset wasn’t to your liking, you could replace it with a standard 5-pin DIN microphone.