From page 22:
"BASIC MARKER OPERATION1- To turn your marker on: Press and hold the POWER button until the LED Flashes RED.
2- To fire the marker: A Solid Red LED (or Solid Orange if breech is empty) will be displayed indicating the
marker is ready to fire.
3- To turn the eye off: Tap the power button once to turn off the eye sensors and the LED will change to
SLOW ORANGE FLASH."