Power Input : USB 5V DC / 2,1A Materials : scratch resistant PU leather Padding : cold molded foam Mechanism : Butterfly Armrest : 3D adjustment Gaslift : Class 4 Base material : metal Castor size : 60 mm Castor material : nylon core coated with a soft polyurethane Backrest adjustment : 90°- 150° (swing 90° – 105°) Seat height : from 44 up to 51 cm Load capacity : 120 kg