ELECTRIC STANDING DESK CONVERTER - VERSADESK desk converter is covered by US Patent No; US 10413055 B2; Holds 80 lbs; Converts a traditional computer desk to a sit to stand desk; Felts are attached to the base to protect your desk from scratching; Fast and quiet desk height adjustment; Fully electric power without stopping points; Easily achieve the ergonomic height from 5" to 20 from table surface, ideal for home office, office working station; Monitor and monitor arm not included 2 SPACIOUS TIERS WITH KEYBOARD TRAY: Large space to accommodate up to 3 monitors (optional monitor arms and monitors not included), laptop, note pad and cell phone on the top tier; The lower tier for standard keyboard, and mouse while the top tier comes with control switch and USB charging port