Visual indication ring may be turned off for status signalling (turned ON/OFF, power consumption). That means each status change will be signaled by a short white blink of the ring. Disabling it will not change operation of the device. To disable the LED ring:

  1. Insert the Wall Plug in a socket
  2. Press and hold the B-button for about 3 seconds
  3. Release the B-button after LED ring starts pulsing white
  4. To restore visual indications perform above procedure again