Mainboard of LONGER LK4 PRO/LK5 PRO

• The latest motherboard for the LK5 PRO (machines with a firmware version containing E3 in the About section)
• It is not compatible with old versions of the LK5 PRO, LK4 PRO, and U30 PRO series. Please purchase the older version of the motherboard for these product series.

The firmware download: 

LK4 PRO: https://drive.google.com/file/d/1DNSbx0eSN4obK-_AU6Kb1mFZQg_0Ng8t/view