Related Clues:

• Thermostat feature
• One looking for the right key?
• Push-button alternative
• Tune in
• Lock feature
• Use an old-fashioned phone
• Place a call
• Push-button precursor
• Sound engineer's knob
• Guitarist's need
• DVR part
• Thing a host might warn you not to touch, after 'that'
• Panel reading
• I-XII place, perhaps
• One adept at pulling strings?