Quickly touch to Switch power on and off, when it is on, Long touch to enter the unidirectional dimmable model. Leave touch to lock the brightness. To power again the brightness will be the same as last was locked. When it is power off, long touch is not workable.
The touch board has a backlight, when the lamp is powered off, the backlight on when it was power on, the backlight is weakly light.
This lamp was powered on, it will need about 0.5s to be stable, during this period please touch the key again. Avoid to use in the humidity environment.