Left Only - KeyMouse Track 304 (Beta) Left Hand KeyMouse Track 304.. Product #: KM-TRACK-304-L Regular price: $349.50 $349.50

Left Only - KeyMouse Track 304 (Beta)

Item #: KM-TRACK-304-L

Price: $349.50

Available Options

Cherry Switch Color:
MX Brown (Default) - Tactile (55cN operating force)
MX Blue - Tactile "Clicky" (60 cN operating force)
MX Silent Red - Linear (45 cN operating force)
MX Silver - Linear (Shorter Travel) (45 cN operating force)
Key Cap Layout:
QWERTY (Default)
Blank Key Caps

NOTE: This product is being sold as Beta.

Our target users are those that spend pretty much all day every day at the computer.  We've developed many features specifically with this in mind.  Our primary goal is to increase user efficiency and comfort.  Here are a few of our key features:

  • Genuine Cherry MX Mechanical Key Switches
    If you're not familiar with mechanical switches, they are much higher quality than typical keyboards. Cherry keys are manufactured in Germany with high precision. They have a premium feel that lasts up to 50 million presses per key.
    For more details on the Cherry MX switches, see article: Cherry MX Switch Types

  • Fully Re-programmable Keys
    You can change the function every key and button on KeyMouse Track (including the commands for scrolling up and scrolling down on the scroll wheel for both left/right hands).  There are 6 key layers that can be saved into the devices.

  • Diodes on Every Key & Button for Anti-Ghosting
    Each key has it's own circuit board with a diode to prevent ghosting.

  • High Resolution 12,000 DPI Mouse Sensors (Both Hands)
    You can program keys to adjust the speed/DPI of left/right or both hands.  We have many options such as adjusting speed while a key is held down (and it reverts back to previous speed when key is up), adjust speeds faster, or slower, etc.

  • Custom 3 Color Key Caps
    Our key caps have white, blue, and yellow colors on them to show the various key layers (particularly for number pad and arrows)

  • Trackball Diameter is 25.8mm

  • Trackball also functions as the Scroll on the Fn Blue layer by default.

  • "Post" buttons in the middle of keys YUHJ and RTFG (can be assigned as mouse click buttons).

  • Angle of "K" key (middle finger on home row) is 12 degrees side to side

  • Weight - One device (such as Right Hand Only) weighs approx. 12.6 oz (357 g) 

  • Backlighting for Cherry Key Switches



1. This version does not include Bluetooth or RF pairing as previous versions did.
2. The product is 3D Printed.  The finish is not like injection molded products.
3. Fn Yellow and Fn Blue key layers do not match perfectly with the software, but they are very close.
4. KeyMouse Track is not painted, as there is no need for your hands to grip the device like KeyMouse Alpha.
5. For best results, trackballs need removed and cleaned every few days.
6. For dimensions, click here.
7. If you choose the "Assemble Myself" option above to save money, be warned that it is a lot of work, and takes a lot of time.


Box Contents:

  • Left Hand fully assembled KeyMouse Track
  • 2 Meter USB Cable (Braided)
  • Key Cap Puller
  • Extra Key Caps
  • 3D printed trackball removal tool



1 Year Warranty (from date of purchase)
Currently we will cover any defective parts + shipping to your location.  You will be responsible to replace the parts.

Warranty does not cover any damage you cause to the devices.

Return Policy:
We will offer you a 30 day return policy from the time of delivery. If you feel like it doesn't work for you, you can return it. You will be refunded the price of the product minus a 10% product return fee. You will be responsible to pay for return shipping. It must be returned in the original packaging, include all hardware and components, and be in perfect condition, both cosmetically and mechanically.