Adjustable Type: The height of the A3 information board can be adjusted from 85-130 cm. The frame can rotate 360 degrees. The base diameter is 25cm. (A4 screen size: 21 x 29.7 cm / A3 screen size: 29.7 x 42 cm) Protective Type: The information board frame includes a UV PVC protective cover, which can prevent dust, fingerprints, and bad weather. It effectively protects the clarity of the poster. Stable Type: The rubber base of the information board can be filled with water or sand for more stable operation. The rubber band can protect the floor and prevent friction. (If parts are broken, they can be replaced.) Best Choice: An excellent display assistant, suitable for many occasions such as store signs, weddings, demonstrations, exhibitions, concerts, restaurants, hotels, shopping centers, offices, schools, and exhibition advertising. Suitable for both indoor and outdoor use.