After A Days Work,You Need Relax. At This Time,Proxracer Brings You Comfortable Chair With Professional Ergonomic Design. Feature: Larger-Size Seat Cushion, Wider Chair Back.Ergonomic Thicker Foam Padding, High-Quality Pu Covering.Comfortable Head, Lumbar Support With Usb Connect Electric Massage And Foot Support. *Vibratory Massage Function, Effectively Relieve Lumbar. 360 Degree Swivel / 90 To 160 Degree Tilt Mechanism. Chair Height Adjustable /Armrests Height Adjustable. Heavy Duty Chair Base With Castors For Better Stability. Maximum Capacity: 300Lbs. Size: Overall Height: 49.8"-52.76" Seat Height:18.9"-22.05" *Seat Area: 20.87"(W)X20.87"(D)