Adjustable backrest from 90 degrees to 180 degrees, to sit or lie on the chair freely When connected with power supply, the lumbar cushion can provide comfortable massaging experience to alleviate waist muscle fatigue Ultra-wide seat that can be adjusted to a desired height Headrest that reduces discomfort in the neck Adjustable armrests for soft support to arms Filled with high resilience sponge for softness and comfort 360-degree swivel design Smooth wheels and 5-claw base for easy movement and stability Overall dimensions: 29-in L x 29-in W x 50-in to 54-in H Costway Contemporary Ergonomic Adjustable Height Swivel Headrest Chair - White