ErgoDirect ED900-81D Computer Keyboard Tray with Dual Mouse Platform - Humanscale

  • keyboard tray with a dual sturdy mouse platforms
Product ID 16661

ErgoDirect has been working closely with Humanscale since 2004 trying to bring comfort and productivity to millions of office employees and recently, to individuals working from home around the world. 

Humanscale offers a full line of durable keyboard tray and mouse platform options created to meet the needs of a wide variety of individuals and office environments. Each of the platform options is designed to ensure that users type and mouse within their neutral reach zone, thereby encouraging safe, sustainable working postures.

By combining two of the oval-shaped sturdy mouse platforms with the award-winning 900 keyboard mechanism, ErgoDirect created the most non-intrusive, intuitively adjustable keyboard support available.

900 keyboard platform is made of phenolic, an ultra-strong, remarkably thin (¼ inch) composite that is non-toxic, durable, and easy to clean. Standard 900 keyboard platform is designed to support nearly all standard keyboards and to fit most desks. Humanscale 900 keyboard tray dimensions: 19" W x 10-5/8" D.

Features of Keyboard Tray Mechanism

  • Intuitive height adjustment that requires no locks, levers or controls
  • Dial-a-tilt positioning allows you to type at the angle most comfortable for you
  • Ultra-thin profile to provide maximum knee clearance
  • Superior design to provide maximum strength and stability
  • Raised tilt mechanism to protect the keyboard from collisions with the edge of the desk


Keyboard Systems - In many ways, keyboard support is the heart of an ergonomic workstation. As reach and vision drive posture, an articulating keyboard system allows the user to sit in a healthy, neutral posture by bringing the keyboard and mouse to the user. A well-designed articulating keyboard system offers protection from carpal tunnel syndrome, neck and back pain, and other musculoskeletal issues. Since 1995, Humanscale has been the leading manufacturer of articulating keyboard systems and today sells more than all other manufacturers combined.

Effortless Use - Humanscale patented keyboard systems have effortless height and angle adjustment. Promoting negative tilt keying, the keyboard platforms will not go into a positive tilt.

Durability - Humanscale keyboard trays are solidly anchored to any work surface and shape to specific user needs. Hypoallergenic Gel palm supports offer height and durability, and are designed to be compatible with human skin.

Customization - Humanscale offers three negative-tilt keyboard systems, from 5G to our latest 6G, which combines easy dial-a-tilt and height adjustability with the strongest, most stable arm on the market. Humanscale keyboard supports come in many different configurations, including left/right customization, to support any user need.

Design Story - An ergonomically designed keyboard is essential for every workstation. Ergonomists agree that the healthiest typing posture is one that allows the wrists to maintain a neutral or slightly pronated posture - straight or bent at a slightly downward angle. For that reason, Humanscale designers created our keyboard systems to allow the keyboard to position anywhere from 0 degrees to a -15 degree angle.

A decade of ergonomic research shows that using a negative sloped adjustable keyboard tray maximizes the time spent working in the neutral hand, wrist, and upper body postures. These postural benefits can’t be achieved by just using a keyboard on a height-adjustable work surface." - Dr. Alan Hedge, Cornell University.

Product Options/Accessories

Model ED900-81D
Manufacturer Ergodirect
Part Number ED900-81D
Keyboard Tray Dimensions 19" W x 10-5/8" D

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