Oregon Scientific RMR966PA Instruction Manual page 5

Battery Installation:
1. Remove the battery compartment door by rotating it to the
direction of "Open
2. Insert two pieces of UM-3 or AA 1.5V batteries in accordance
to the polarities.
3. Press [RESET].
4. Replace the battery compartment door by rotating it back onto
the unit by following the direction of
When the battery power level is low, the respective low battery
indicator [ ] will light up. Replace the batteries or connect it
with AC power adapter
Please note if only AC adapter is connected and no battery is installed,
low battery indicator [
Using AC Power
5
" as shown
"Close ".
] for main unit will also light up.