Multi-functionbackrest rocking, around 30°, being relax; seat height adjustable, 16.7" to 19.9"; mute wheel, 360°rotation. Details3.15-inch padded seat, tireless in long time seating; zippered detachable armrest holster, easy disassembly and cleaning. Multi-sceneThe modern siplicity style is suitable for all kinds of work leisure scenes, office, conference room, bedroom, study. Capacity & dimension320LBS; seating size, 19.8" x 19.2", backrest size, 18.2" x 29.5". Easy to installAn adult can install it in 15 minutes.