VTech RM7754HD - Parent Unit Charging and Indicators; Charge the parent unit battery before use

Charge the parent unit battery before use
The parent unit runs on a rechargeable battery or AC power. To continuously monitor your baby, keep the parent unit connected to AC power. With the battery alone, the parent
unit can cordlessly run for a short time only.
NOTES
Before using the baby monitor for the first time, charge the parent unit battery for 12 hours. When the parent unit battery is fully charged, the battery icon becomes solid.
The standby time varies depending on your actual use.
After the parent unit is fully charged, press POWER until the welcoming screen appears.
The battery icon indicates the battery status (see the following table).
Battery indicators Battery status Action
The screen displays and . The
light flashes.
The battery has very little charge and may be used for only
a short time.
Charge without interruption (about 30 minutes).
The battery icon becomes solid .
The battery is fully charged.
To keep the battery charged, connect it to AC power when
not in use.
Raise the parent unit antenna for better reception
Parent unit icons
Main Menu Options
Monitoring mode (* For RM7754-2HD only)
View baby unit 1 or 2 in Single mode.
View both baby units in Patrol mode.