The Adjustable Sit to Standing Desk Converter Bundle is the perfect way to get your ergonomic workstation started. It comes with a Rocelco Sit to Stand Desk Riser and a Rocelco Medium Anti Fatigue Mat. The Height Adjustable Sit to Standing Desk Riser and Converter with 4 AC outlets and 2 USB 2.0 ports on desktop, offers an extra large top so you can have all your "stuff "within easy reach whether sitting or standing. Now you can sit part of the day or stand to take advantage of all the health benefits that come with standing and moving around. With the desk converter, you and your associates will become healthier and more productive. It fits over your current desk with no need to buy additional furniture. With its spacious 45.75" W x 23.75" D work surface, you can hold up to 3 large monitors, a laptop, and more. It also includes an retractable keyboard tray that measures 25.75" W x 11.25" D that is an ergonomic 4.5" below the desktop. Enhanced Vertical Range rises up to 20" and down to 5", to optimize the ergonomic work position for people of all heights. Straight up and down motion minimizes required depth (23"). Gas piston assist allows you to easily raise and lower up to 45lbs. Grommet hole allows you to route cables or add an optional single, double or triple monitor arm such as the Rocelco , or .  It works with your existing desk or create a complete standing desk with the optional Deluxe Floor Stand . Fully assembled and ready to go!