1. [No assembly needed] Adjustable foot rest swivel foot massager leg lift,Measures 16.9" (L) x 12.9" (W) x 3.1-6.2" (H). Material: Resin Plastic .In the process of using the product, if the product has a sound, you can drop a little oil in it and the sound will disappear 2. [ Angle Adjustment]Tilts 0 - 30°to support your legs at your preferred angle. It rocks back and forth which encourages leg movement therefore increasing the blood flow to your legs and body 3. [Height Adjustable ]Height is manually adjustable to 3 different positions: 3.1" , 4.3 ", 6.2" (8cm/11 cm/16cm). Super easy for you to find the perfect position to suit your needs 4. [Excellent foot rest] framework makes it easy to move anywhere in your home or office ; Features fold-and-unfold mechanism for easy usage and storing Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.