80 cm Seiken ( China Version ) - Test Mode ( Kamen Rider Saber series ) 80 cm 大圣剑 假面骑士圣刃 80cm

Thus have I seen : Some Bilibili toy reviewers accidentally discover the 80cm Seiken (China Version) has a "Test Mode" that can be activated by:
(1) Press trigger, then switch on power.
(2) As power switch on, almost immediately release trigger.
(3) After a split second (i.e. let the trigger "rest" a teeny while) of about 0.3 to 0.4 seconds (???!!!! just exaggerating) , press the trigger 4 times rapidly.
(4) If you hear the "hng hng" sound with red light slow flash, it means you have successfully enter into the test mode.

With this mode, you can set the red light to be always lit up as you display the seiken as Kaenken Rekka. Similarly for Suiseiken Nagare. Unfortunately the test mode does not have yellow light to allow the Raimeiken Ikazuchi to be displayed with yellow light.