Color: Black Open Closed Sign Open Closed Sign, Open Signs Privacy Sliding Door Sign Indicator for Shop Window, Restroom, Office Door, Wall, Window, Restaurants, Retail Salons (Black) Clear and Eye-catchingThe font is clearly printed, with red background on one side and green background. The difference between two colors makes it very eye-catching in this place. Quick ChangesThis sign is a sliding door sign, one sign can indicate two states. Just put it in a horizontal position, the slider can be easily moved to open or close it smoothly and quickly. Multiple UsesSuitable for use in any shop door/office door/meeting room/home office/dormitory that wants to prevent others from disturbing their work indoors. Also suitable for use in exhibition/recording rooms/outdoor public buildings. By sliding the slider, the indicator can be OPEN or CLOSED, easily and clearly knowing the state of the room.