The Kenwood TM-251A series include dual band receive capability. The TM-251A and TM-451A can switch between 144 MHz and 440 MHz on receive. They also feature packet compatibility for 1200 or 9600 bps accessible from the rear panel. There are 40 memory channels plus 1 call channel, and all can be used to store transmit and receive frequencies as well as repeater and signaling data. The built-in digital recording system enables automatic storing of a signal picked up by the radio for later playback (for two 8 second messages). The TM-251A transmits on 2 meters with three output power levels:  5/10/50 watts. Supplied with MC-45DM DTMF hand mic.

The Kenwood TM-451A transmits on 440 MHz with three output power levels:  5/10/35 watts.