To activate the unit:
1. Open the battery compartment (marked OPEN) on the
right side of the back of the unit by sliding its cover
down, in the direction of the arrow stenciled on it.
2. Remove the black activation tab under the LR44
button battery. Discard the tab.
3. Install the battery in the well so its rounded side faces
down and its flat side (marked “LR44”) faces up. The
battery does not snap into place, so do not apply
downward pressure.
4. Replace the battery compartment cover by sliding it
up, in the direction opposite the arrow on it. The
pressure of the cover is what holds the battery in
place.
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