Remember the Wilson wh2510 radios. There was a jumper wire that was cut after programming. Course changes to the program, required the rtadios to be removed, so techs hust installed another external speaker jack. The speaker was wired to the jumper cables. If you plugged in a shorted out speaker plug, the radio was programmable. Motorola just had a shxt fit over what the radio was capable of doing. At the time, Motorola and Ge and RCA made trunk mount radios. This was an under the dash unit. It was 25 watts, if you neded more power, a 100 watt amp was offered. It was full programmable, split frequencies, sub tones, and the unit could scan. Not fast by todays standards but in the early 70's, it was a step forward.