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bm40 rgb 40% hot swap Custom Mechanical Keyboard PCB qmk underglow type c planck

Regular price $44.90

Shipping calculated at checkout




During COVID-19, If you do not receive the goods after 90 days, please contact us in time. We will contact the express company for you. If we confirm that the goods cannot arrive or are lost, we will refund to you.

If there is any defect or defect in the product you received, please contact us in time and attach video or picture description. After confirmation, we will send you a replacement product for free. Thank you for your understanding and support.

UPDATE - Since the COVID-19, the longest shipping time we encounter is over 140 days with free shipping. If you don't receive the parcel after 140 days, please feel free to contact us for a solution (refund or reshipment). NOTE - the 140-day starter is from the day you have the tracking info, NOT from the day when you place the order.

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

Return shipping fee is required. You need to pay return shipping fee for returns.


Where do I download software if I buy a keyboard that needs software?

Please check menu bar - download tab to download the software and instruction.

How do I choose what we want if i buy a custom kit?

If you buy a PCB kit, which has switch, cable colour and case colour option, please leave a note at checkout.

Pls pay attention: Before soldering switches, pls test all keys(pls use tweezers or iron wire) and LEDs(If PCB can support 2pin single colour led or RGB led) to make sure all keys can work properly, before soldering, if the PCB has any key problem, we can re-ship a new one, but after soldering, feel so sorry we can't re-ship it, we can help you repair it(buyer need pay the returning shipping fee). If you order our products, we assume that you agree to the above terms.




  • Kit1:BM40 RGB PCB+BM40 2U Stabilizers x1
  • Kit2:BM40 RGB PCB+BM40 2U Stabilizers x1+Gateron Switch x50(Pls leave us a message about your switch choice when you submit your order)
  • Kit3:BM40 RGB PCB+BM40 2U Stabilizers x1+Gateron Switch x50(Pls leave us a message about your switch choice when you submit your order)+Coiled Cable Type-c(Pls choose from Grey/Black/White color)
  • Kit4:BM40 RGB PCB+Brass plate x1


Pls Pay attention:
  • 1.Switch doesnt include the Gateron silent switch.
  • 2.You can choose from Gateron Clear/Blue/Green/Yellow/Red/Brown/Black with 3pin RGB/5pin RGB/3pin SMD/5pin SMD.
  • 3.If you order PCB, you will only get a BM40 RGB PCB.
  • 4.At this link, not including any CNC case or any keycap:).

  • 1\More than 40 keys
  • 2\Supports offline flash app
  • 3\Fully programmable PCB(QMK supported)
  • 4\Full hot-swappable switch sockets
  • 5\Full RGB switches LEDs(With kinds of LED effects)
  • 6\6 bottom  RGB  underglow leds(pre-soldered)
  • 7\Standard ICSP interface
  • 8\MX Stem support
  • 9\All components of the board have been pre-soldered so the PCB is ready for key switches and LEDs
  • 10\Type C port
How to flash BM40 RGB, check download tab on Manu bar.
Pls pay attention: PCB only, not including other things.
If you want to add or change RGB adjusting key-value, pls click SPECIAL at VIA and then use Any key to add relevant code.
  • 0x5d5e----Switch RGB On\Off
  • 0x5d5f----Switch RGB Mode
  • 0x5d60----Switch RGB Hue+
  • 0x5d61----Switch RGB Hue-
  • 0x5d62----Color Saturation+
  • 0x5d63----Color Saturation-
  • 0x5d64----Brightness+
  • 0x5d65----Brightness-
BM40 选购

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