The Asymmetrical ErgoSlider Plus Underarm Support is an optional accessory for the ErgoSlider Plus Mouse (#BNEESLB) - Designed to provide support and comfort for your arms while you work at your desk and computer. - The Underarm Support is attached to your tabletop to also support you when working while standing. - By reducing discomfort and strain, it can help you work more comfortably and efficiently, potentially increasing your productivity and focus. BakkerElkhuizen guarantees the longevity of its products. Register your product before the basic warranty expires on the manufacturer's website Simply use the registration code or the product EAN code to benefit from a lifetime warranty.