This footrest helps you adopt a good posture at the computer. A footrest can resolve issues of insufficient height adjustment of the desk or office chair. With a good footrest the legs do not hang and circulation isn't cut off, which contributes to a better work posture. Ergonomic: Steady, safe and has anti-slip layer Operation: Foot Practical: Easy height adjustment with the red button 'Dual' version: Height adjustable 4-17 cm and 17-30 cm BakkerElkhuizen guarantees the longevity of its products. Register your product before the basic warranty expires on the manufacturer's website using the registration code or the EAN number on your product for an extended warranty of up to 5 years on electronics or even longer warranties on non-electronic products! * Extended warranties apply to all non-electronic products with the exception of all gas spring parts, which are covered by a 5-year manufacturer warranty.