Features:<br> [Useful privacy sign], 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 still remained unless you change it manually.<br> [Pefect design and easily identified]5 inch diameter. Four states in different colors , so you can distinguish different sign content easily.<br> [Convenient to install] Convenient to install and no residue left when removed. Works on all occasions , stainless steel, wood cabinet doors etc.<br> [Multiple uses]Suitable for office room, conference room, or any room that needs privacy.<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.<br> Color: Black<br> Material: Acrylic<br> Package Contents:<br> 4X Office Door Sign<br> Only the above package content, other products are not included.<br> 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.