DataHand Keyboard

Here is my experience with the DataHand keyboard. In 1999, after enduring years of growing issues with my typing pain, I researched alternative keyboards and decided that the DataHand was the only keyboard that really seemed to properly address my problems. I purchased a DataHand Pro II — spending $1200 on this keyboard!

I chose the DataHand because it is the only keyboard that doesn't require me to contort my hands to reach keys outside the "home" (ASDF/JKL;) keys. With the DataHand, your fingers are always on these home keys.

With minimal movement, each finger has access to five keys — accessed by pressing up, down, left, right, and inward. The layout is similar to QWERTY — for instance, pressing up with the left four fingers types "QWER", and pressing in with these fingers types "ASDF". There are a few exceptions, but it's basically QWERTY. Punctuation and function keys are non-standard, and are accessed via thumb-selected mode-switching keys.

DataHand Pro II KeyboardDataHand - Key Layout

The keyboard has many adjustments for various hand sizes, including: palm size, key reach, and key depth:

DataHand - Adjustments - Key Finger DepthDataHand - Adjustments - Key Finger LengthDataHand - Palm Rests - "large", "small", "extra small"

This web page was created with my DataHand! I've still haven't found a better ergonomic keyboard out there.

My Keyboard Chair

I wanted my hands be in the most natural/relaxed position. When I let my hands relax, they hang down at the sides of my chair, angled inward at about 45 degrees. I decided to mount my keyboard there, precisely where my hands hang at rest.

I mounted my DataHand to an office chair by removing the arm rests, and attaching the keyboard halves with some sturdy steel pipe strapping. I lengthened the cable connection between the two halves of the keyboard using a short length of 15-pin serial cable.

This all works well, but it's not very portable! Sometimes I miss using a laptop computer, and working from anywhere.

DataHand Keyboard - Mounted to ChairDataHand Keyboard - Mounted to ChairDataHand & Foot Mouse, Foot KeyboardDataHand & Foot Mouse, Foot KeyboardDataHand - Mounted to ChairDataHand - Mounted to ChairDataHand - Mounted to Chair

The DataHand company once sold their own chair — the "DataChair" — an ordinary office chair with DataHand keyboard halves mounted on the armrests. They offered this special chair for $1600!

DataHand's "DataChair"

Getting Started

I was lucky to be able to take time off from work to get started with the DataHand. (I type for a living.) I put away my old keyboard so I wouldn't be tempted to use it. Then, it took me about two weeks to stop being completely useless typing on the DataHand. After a few weeks, I could respond to emails (slowly). After a month of practice, I was more or less back to normal with my work. As the DataHand is almost a QWERTY keyboard, typing simple text (just letters of the alphabet) is fairly easy to learn. It was the function keys, numbers, and punctuation that were difficult to master.

The Good Stuff

  • ergonomics: Keys require minimal movement and pressure to activate.
  • positioning: The DataHand can be split and positioned at various angles, and the keys can be moved to account for various hand sizes.
  • customizable: The "Pro II" model (but not the "Personal" model) includes some limited customizing ability. You can remap a few keys of your choice to other keys or short macro sequences. The process is a bit tricky, but it works. Here is how I remap my DataHand keys.

The Bad Stuff

  • tricky to learn: It takes a month of constant practice to get back to full-speed typing.
  • expensive: The DataHand Pro II keyboard cost over $1200 new.
  • discontinued: DataHand keyboards are still occasionally found for sale (used) on eBay — but the going price is now over $250 $600 $2000.
  • inadequate mouse: The DataHand does not provide a good mouse solution. It includes a "mouse mode", where the arrow keys can be used to walk the mouse pointer linearly across the screen — but this is tedious. I ended up using a foot mouse.
  • limited customization: After more than about five key remappings, the DataHand customization memory gets full. The keyboard stops working and will require a hard-reset.
  • sunlight: The DataHand uses optical switches, which do not work in direct sunlight.
  • dirt: Dirt, lint, and spills can block the optical switches, and cause keys to stick. Every few years I disassemble my DataHand, and wash all the parts in a dishwasher. Here is a page with detailed cleaning instructions.
  • sticky keys: The DataHand uses magnets for key-return action. These key-return "springs" are intended to be weak to minimize key effort, but sometimes they aren't quite strong enough — especially when the DataHand is mounted vertically, as I have done. I have boosted the key-return strength for a few keys by attaching stronger magnets — I use the "rare earth" magnets from my used Philips Sonicare toothbrush heads!
  • fragile: Some of the plastic thumb-activated mode keys tend to break over time. They can be repaired with epoxy glue. Also, the keys are held in place only by their solder connections to the underlying circuit board. Over time they can crack, I find myself needing to go in with a soldering iron to re-melt those solder connections.
  • reliability: Once or twice a year, the keyboard goes nuts and requires a hard-reset — and I have to re-enter all my customizations.

Here are some details on Datahand disassembly and repair...

Other DataHand Models

When I bought my keyboard, DataHand sold two major models — the "Pro II" and the "Personal". The Personal sold for about half the price of the Pro II, but couldn't be customized. The only difference was the firmware. I didn't know it at the time, but the Personal could be upgraded (a simple swap of a socketed microcontroller chip) to a Pro II for less than $200!

Here are some early photos I've collected of the DataHand keyboard. The first three photos show early (1989-1991) DataHand prototypes by Dale Retter and Industrial Innovations of Scottsdale, Arizona. Then I show original keyboard sold by DataHand in the mid-1990s - I believe these are all designated "DH200" by DataHand. If you are shopping for a used DataHand, I would avoid buying these older models as they are less configurable.

DataHand (1989)DataHand (1989) - With MacintoshDataHand (1991) - by Industrial InnovationsDataHand Keyboard - DH200DataHand Keyboard - DH200DataHand Keyboard - DH200DataHand Keyboard - DH200DataHand Keyboard - DH200 - BlackDataHand Keyboard - DH200 - Black

Here's a strange one - the "RBCS" DataHand. I bought this one off Ebay, just for its parts. It appears to be a custom factory order - for some kind of mailing address data-entry purpose. This keyboard deletes mouse function, as well as the "NORMAL" and "MOUSE/F" keys. Its key template shows functions like: "CITY", "ZIP+4", "POST MSTR", "STREET", "BLDG", "MOVE IMAGE". The modes are "SHIFT", "NORM", and "CITY".

DataHand - RBCS - Left HandDataHand - RBCS - Right HandDataHand - RBCSDataHand - RBCS - LabelDataHand - RBCS - Missing "Normal" and "Mouse/Function" keysDataHand - RBCS - Firmware Sticker

DataHand Customizations

Aegray Wireless

The firmware guts of this DataHand were replaced with a Teensy board and XBee wireless. (

Aegray Wireless DataHand - Top viewAegray Wireless DataHand - Right hand top view with TeensyAegray Wireless DataHand - receiver ArduinoAegray Wireless DataHand - Right hand back view

The Trackhand

This guy hacked a trackball into his DH200 keyboard! Of course, the firmware was upgraded — again with a Teensy microcontroller. (

Trackhand - DataHand DH200 with TrackballTrackhand - DataHand DH200 with Trackball - Inside

Lego DataHand

Here's a "DataHand" clone built out of Legos and microswitches! (

Lego "DataHand"Lego "DataHand" - HandLego "DataHand" - ChairLego "DataHand" - Switches

The DodoHand — Recreating the DataHand

Finally, here's an amazing project to recreate the DataHand from scratch, with 3D-printed parts and custom firmware. ( and

Datahand Clone - DesignDatahand Clone - Key - 3D PrintedDatahand Clone - assembled

Other Resources

Datahand - Industrial Innovations - Informational Prospectus - p1Datahand - Industrial Innovations - Informational Prospectus - p3DataHand - Advances in Industrial Ergonomics and Safety - William Ferrill - p4

DataHand Patents

DataHand Patent US4913573 - 1997 p2DataHand Patent US4913573 - 1997 p4DataHand Patent US4913573 - 1997 p5Datahand Patent US5743666 - 1998 p2Datahand Patent US5743666 - 1998 p3Datahand Patent US5825362 - 1998 p2