I have an old Superfox Vixen II from 1984.
In it's day, it was considered one of the challengers to the Escort by ComGeneral Corp.
It has a manual/fixed squelch setting which allows you to set the sensitivity along with a rotary volumn switch.
A row of LEDs at the top were popular in units during this time.
There was no off buttom to turn the LEDs off though.
It has long since been retired. My Dad used it in late 80s for a while.
Good memories of days of old ......keeping an eye out for smokey.