[Pre-Order] Ursa Major by Sirius

$420.00 USD

Ursa Major by Sirius

Ursa Major is a fully wireless bluetooth split 75% keyboard from Sirius. Recognized as a single input device in the PC, Ursa Major needs no cable connection between each split and - supports cross-hand key combination and layers.



  • Assembly Instructions PDF (CN/EN)
  • Pre-order ends on Jan.16 , 2023.
  • Estimated shipping date: June/July 2023.
  • This product is requires assembly. You will need switches, stabilizers, and keycaps to build this keyboard
  • You will need to solder the switches
  • Pictures are all taken with actual products (except the color variant showcases)
  • Please join from your regional vendor:
    US/Asia: zFrontier
    EU: Keygem
    UK: Protozoa
    OCE: Switchkeys



  • 2 pieces of Nokia BL-5J lithium batteries included by default
  • Due to shipping restrictions we might not be able to ship parcels with batteries to some areas. If this is the case, you will need to source batteries on your own.


  • fully wireless bluetooth split 75% keyboard recognized as a single input device
  • supports cross-hand key combination and layers
  • top mount, soldered PCB, dual mode (wired and Bluetooth wireless)
  • Built-in lithium battery type-c charging, the battery life expectancy: half a year (some vendors might not offer lithium batteries due to shipping regulations, see more below)
  • fr4 plate with antenna integrated for signal boosting
  • Fully programmable using the LNE LINK (https://www.lnelab.com/ or https://github.com/ln-org/lne_link) available for both Windows and MacOS. No flashing required.
  • Programmable knob
  • The weight is the same color as the middle frame with a brushed finish (E-white limited edition comes with a PVD brass middle frame and weight)
  • Supports plate mount stabilizers
  • Comes with a hard carry case

Item contains

  • Anodized aluminum housing
  • Middle frame and weight (regular version is aluminum, E-White limited version is brass)
  • PCB
  • FR4 plate
  • 2 pieces of Nokia BL-5J lithium batteries
  • Dampener sheet


  • Colors:
    Silver housing + Gunmetal mid frame and weight
    Black housing + Dark green mid frame and weight
    Lavender housing + Silver mid frame and weight
    E-white housing + PVD brass mid frame and weight
  • Extras (purchase extra parts here):
    • Mid frame + weight (extra)
      • Dark blue
      • Silver
      • Gunmetal
      • Dark green
      • Black
      • Burgundy
      • Pink
      • Red
      • Lavender
    • 3D printed stand (clear)
    • Pre-assembly (extra): plate + PCB combo for both sides








      Shipping Info

      • This is a pre-order item, estimated shipping time is June/July 2023
      • Shipping calculated at check out
      • Please DO NOT purchase this item with other products.