[Features] · Thumb rotor switch A7BS/A7BL optional item. · Thumb rotor switch with external stopper A7BS-20□-S(-1). · Use the A7BS-S stopper pins to specify a dial display for this switch. · Pin insertion position depends on dial display range. <Ex. If showing from> 0 to 5. Operating the + button stops at 5. Operating the - button stops at 0.