● 18"-21" adjustable height with height adjustment lever to fit different people● Pull out the lever for unlocking● The rocking function with tension knob (tight & loose) for relaxation● Extra lumbar support with adjustable depth and height for added comfort● Premium PVC leather and soft sponge for ultimate comfort● Hook and loop fasteners for easy detachment and maintenance● Supports up to 330 lbs with 5-claw base and gas lift● 5 rolling casters make it easy to move● Clear user manual for easy assembly● Suitable for offices living rooms bedrooms and studies