Installation Instruction： https://www.youtube.com/watch?v=PDAVMRndcKs Features： 1.Simple & Elegant - Sleek design and simple adjustment mid-back desk chair. Match different decorative styles. 2.Flip-up Arms - Space saving flip-up arms for different situations. When it is empty, you can put it under your desk 3.Height Adjustable - Chair height is adjustable, you can adjust it to your prefer height and perfect the sitting position 4.Tilt Lever - Push in to lock in an upright position, pullput toactivate rocking motion 5.Stable & durable: Heavy duty base with smooth and silenced rolling casters, Max Capacity 250lbs Specification: Product Model: HDNY163BM / WM Product Size: 102 x 64 x 64cm Package Size: 650 x 330 x 625mm Product Weight: 10.8kg Package Included： Xiaomi Hbada Ergonomic Office Chair XiaoY-Series 1pcs, About Hbada Hbada means black and white tone in English, is a professional office furniture supplier and centers on black and white tone design. Inherited from Minimalism Style, Hbada specializes in environment-friendly, stylish, minimalism and comfortable Ergonomic Office Chair. As an early pioneer in Ergonomic Office Chair, Hbada has become well-know in the world with its advanced product research & development, excellent product quality and perfect service. With its top production lines from German and Italy, Hbada only employs the best materials in Ergonomic Office Chairs, have won its high reputation among the globe market since its birth.