Features: [Useful privacy sign]DO NOT DISTURB, PLEASE KNOCK, IN A MEETING and OUT OF OFFICE, help to inform the exact status of your office . You can easily switch between the four options. The status will still remained unless you change it manually. [Pefect design and easily identified]5 inch diameter. Four states in different colors , so you can distinguish different sign content easily. [Convenient to install] Convenient to install and no residue left when removed. Works on all occasions , stainless steel, wood cabinet doors etc. [Multiple uses]Suitable for office room, conference room, or any room that needs privacy.<br><br>[Quick changes]One sign can show 4 states. Only put it in a horizontal position, the slider can slide easily to display smoothly and quickly. Color: Black Material: Acrylic<br><br>Package Contents: 4X Office Door Sign<br><br>Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.