Color: Black - Open Close Sign, Open Closed Sign, Privacy Slide Door Sign Indicator for Business Storefront, Restroom, Office Door, Wall, Window, Restaurants, Retail, Salon Shops (Black). Clear and eye-catching design with bold printed text. One side features a red background and the other a green background, creating high visibility and clear status indication. Offers two installation options: can be placed on magnetic surfaces or attached to non-magnetic surfaces using the included adhesive tape. Easy to install without tools. Constructed from durable aluminum with a quality acrylic interior cover. Lightweight, portable, and waterproof. Designed for smooth and quick sliding operation to display either "Open" or "Closed" status. Suitable for use on shop doors, office doors, meeting rooms, home offices, dorm rooms, and other spaces where room status needs to be clearly communicated. Ideal for indoor and outdoor use in retail stores, salons, restaurants, offices, and public buildings. Simple and effective visual indicator for room availability.