Program selection switch for restaurants, shops, etc. The PRO 3 UP is equipped with a rotary switch for 6 programs. It is also available with a mandatory call relay as an option. The metal support plate is screwed onto a standard flush-mounted box with a depth of 63 mm. It is prepared for the blind switch cover with rotary knob of the respective switch program. These parts are available from electrical wholesalers. For the exact order designation depending on the switch program, see the table at the end of the audio electronics chapter.
