EOTech 556 - Manual (Page 8)

Figure 5: Battery Cap Removal
2.1.4 Electronic Features
All electronic controls are performed through use of the pushbutton switches located at the left side of the
unit housing as shown in Figure 5. To ensure proper operation of the pushbutton switches, press firmly on
the center of the switch.
Figure 6: Pushbuttons
1. ON/ Auto Battery Check
Pressing the Up or Down Arrow pushbutton switches will turn the sight ON at Level 12. See item 4 under
this section for a description of Auto shutdown. The sight will automatically perform a battery check every
time it is turned on. If the batteries have less than 20% of life left, the sight will turn on with the reticle image
blinking on and off for 5 seconds. If the remaining battery life is more than 20%, the sight will turn on with a
steady reticle pattern. The battery condition can be checked any time by turning the sight off and back on.
2. OFF
To turn the sight off, simultaneously press both the UP and DOWN arrows. Verify that the sight turns off by
seeing no reticle through the heads-up display window.
3. Brightness Adjustment