My grandpa had a two-button remote that looked a bit like that. One button went up one channel at a time; the other raised the volume (one step at a time to maximum, wrapping around to minimum). The remote function was actually sound-activated; each button would hit a rod with a spring-loaded striker and it would make a noise that we mostly couldn't hear but the TV could.
They also had a phone with a regular bell-style ringer. When the phone rang, the TV would change channels three or four times...
They also had a phone with a regular bell-style ringer. When the phone rang, the TV would change channels three or four times...
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