Click either one of the buttons only (Left or Right)
Click both buttons together
Click and hold both buttons.
(Light level will go down in steps - 1Step/sec - If the light level is too low, it will switch off)
Flashing lights means that the battery needs to be changed.
Take out the 2 screws, Open the case and replace the 9v square battery (standard type). Best to use a quality brand.
LED alignment and direction.
Flash LED (see above, how to change battery)
Check Camera settings
Check the same elements as "Dark Photos".
Watch the video on how to take the iris photo. Make sure the positioning is good and also allow enough time for the camera to detect and set the focus (Half press the shutter button till the camera beeps). Only after the beep, fully press the shutter button to take the photo.