Humanscale Keyboard Tray with Dual High Clip Mouse Platform, ED-900-DH

"Build your own system, base starts as keyboard tray only".

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Product ID: 16662
  • Most ergonomic keyboard tray with ability to change hands for left and right hand mousing
  • This pre-configured keyboard tray includes the Standard Keyboard tray with Right and Left High Clip Mouse Platform
  • Keyboard tray dimension: 19" W x 10 5/8" D
  • High clip mouse platform size: 8.5" in diameter
List Price: $240.00
Our Price: $195.00
Shipping: $0.00 *
Usually ships in 10 to 12 business days
* applies to Contiguous United States


                    Humanscale 90D Dual Clip Mouse Platform   Diagram for Humanscale 900 Standard Platform Keyboard Tray System                    


This pre-configured Keyboard tray system is designed to create an ideal ergonomic setting for users by enabling them to switch between the right and left hand while typing on the keyboard. It is key to position the keyboard tray in a way that the user stays in the neutral reach zone for all typing and mousing activities. At the same time to avoid excessive pressure to either right or left hand, it is highly recommended to train the brain to mouse with both hands. The Dual Clip mouse with this keyboard tray is targeted for the users who like to avoid the long term pressure put on either wrist through excessive mousing.

By combining one of these platform options with one our award winning mechanisms, you will create the most non-instrusive, intuitively adjustable keyboard support available. Humanscale 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 dimensions: 19" W x 10-5/8" D.

90HD dual High Clip mouse platform comes in 8.5" diameter. Clip mouse is the only mousing platform that let users adjust their mousing position in all three dimensions for maximum comfort. With height, depth, lateral, and tilt adjustability, it can be positioned where it is needed for truly custom support.


                    Humanscale Clip Mouse Platform   Humanscale Clip Mouse Platform positions                    

Features of Keyboard Tray Mechanism

  • Intuitive height adjustment that requires no locks, levers or controls
  • Dial-a-tilt positioning that allows you to type at the angle most comfortable for you
  • Ultra think 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, a 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 through 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 positioned 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 a 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.


The Neutral Reach Zone
The Neutral Reach Zone is the area that can be conveniently reached with a sweep of the forearm while the upper arm hangs in a natural position at the side. (Sanders & McCormick, 1993)

Unlike older generation keyboard/mouse solutions, our platforms are designed to ensure that nearly all users are able to work consistently within their Neutral Reach Zone, and thus maintain a low-risk, sustainable posture.

Neutral Reach Zone



Option 1 - Arms Type

Humanscale 2G Adjustable Keyboard Arm Mechanism


Humanscale 5G Height Adjustable Keyboard Arm Mechanism


Humanscale 6G Adjustable Keyboard Arm Mechanism


Humanscale 5GSM Adjustable Short Arm Keyboard Mechanism


Humanscale 5GAD Above Desk Adjustable longer Arm Keyboard Mechanism



Option 2 - Track

Refers to the under-desk mounted track that the mechanism slides along. Measure the amount of flat space you have on the under-side (from front to back of your desk) to determine which track length best suits you. The longer the track you are able to fit, the farther underneath the desk you will be able to slide the platform. The track measures 5-1/2" in width and is available in seven lengths:


11" Track

For real small Desks at least 11" deep "from front to back"

14" Track

For real small Desks at least 14" deep "from front to back"

16" Track

For real small Desks at least 16" deep "from front to back"

18" Track

For smaller Desks at least 18" deep "measure from front to back"

21 3/4" Track (Standard)

For use with 22" deep Desks "measure from front to back"

25" Track

For deeper Desks with up to 25" depth "from front to back"

27" Track

For real deep Desks with up to 27" depth "from front to back"



Option 3 - Track Length

  • Desk has more than 22" clear space under desktop, front to back

  • Less than 22" & more than 18" clearance under desktop, front to back

  • Less than 18" & more than 16" clearance under desktop, front to back

  • Desk has less than 16" & more than 14" clear space under desktop, front to back



Option 4 - Lateral Slider

Humanscale LS Lateral Slider Mechanism Accessory for Keyboard Trays

Humanscale Lateral Slider allows the platform to be adjusted left or right a total of 8" for optimal keyboard positioning. It can be ordered with any keyboard mechanism by indicating "LS" after the mechanism code (e.g., 6GLS or 6GWLS).



Option 5 - Palm Rest

Humanscale Palm Rest Support

Available with either a foam or gel core, our synthetic leather palm supports are comfortable, durable and easy to clean. Our standard palm supports are available in black. However, as with our platforms, other colors can be made available on request.



Option 6 - Corner Solution

Humanscale DE100 Corner Sleeve

Humanscale DE100 Corner Sleeve

DE100 - 29.5" x 12.188"
Fits desks 1" to 1.5" thick

Humanscale DE200 or DE250 Corner Sleeve Solution

Humanscale DE200 or DE250 Corner Sleeve

DE200/250 - 16" diameter
DE 200 fits desks 1" to 1.5" thick
DE 250 fits desks 1.5" to 2.5" thick

Humanscale DE400 or DE450 Corner Sleeve Solution

Humanscale DE400 or DE450 Corner Sleeve Solution

DE400/450 - 38.5" x 13.75"
DE 400 fits desks 1" to 1.5" thick
DE 450 fits desks 1.5" to 2.5" thick



Option 7 - Mouse Pad

Humanscale CMPGEL8 Mouse Pad

8.5" Clip Mouse pad with Gel



Model ED-900-DH
Manufacturer Ergodirect
Part Number ED-900-DH
UPC 709317696806
Keyboard Tray Dimensions 19" W x 10-5/8" D

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Humanscale Keyboard Tray with Dual High Clip Mouse Platform, ED-900-DH