1. Core functions Flexible adaptation and angle adjustment Specially designed for 8.5 "x11" (approximately 21.6cm x 27.9cm) posters, menus, and signage, supporting both horizontal and vertical displays. The label frame can rotate 360 °, and the tilt angle can be adjusted by a knob. It is fixed with a gear locking groove to avoid accidental displacement. Stable loss prevention structure Adopting a thick metal support rod and a 3.5mm thick base, it has a low center of gravity and strong stability, which can resist slight collisions and gentle winds, making it suitable for crowded areas such as store entrances. Aluminum frame with 0.4mm PVC protective film, waterproof and corrosion-resistant, avoiding poster brittleness or damage, and extending service life. Convenient poster replacement Front open frame design, no need for complex tools, simply open the four sides of the frame to quickly replace posters and improve efficiency. 2. Key parameters Suitable size: 8.5 "x 11" (standard Letter size) poster/printed insert Core material: Aluminum frame+0.4mm PVC protective sheet+metal support rod+3.5mm thick base Adjustment method: rotary knob operation+gear locking groove fixation, supporting horizontal and vertical rotation and multi angle tilt Protective performance: Waterproof, corrosion-resistant, able to withstand minor collisions and natural environmental impacts