Safety, functionality, the new type of visibility preeminent display switching between open and touch. Easy to read on both sides. 180 ° Rotation to be fixed with auto stop mechanism. 1 Red Button and press plate for a little twist. 2 Red Button turning the plates away from your hands. Both directions with it as well. 3180 ° Rotation to place to auto automatically stops. Display letters leg screw. Size excluding logo double clip button unit is. Ball chain is sold separately.