light on the parent unit should be on when charging.
light on the parent unit are not on, refer to 
light on the parent unit is off.
light is off when the battery is fully charged even if it is also powered by AC power.
VM321, VM321-2 specifications
The VTech VM321-2 is a state-of-the-art video baby monitor designed to provide parents with peace of mind while keeping an eye on their little ones. This monitor, part of VTech's VM321 series, combines advanced technology with user-friendly features to ensure that caregivers can monitor their child effortlessly.One of the standout features of the VM321-2 is its high-resolution color video display. The monitor boasts a large screen that provides clear visuals, allowing parents to see their baby in detail. This is particularly useful during nighttime monitoring, as the device is equipped with infrared night vision, enabling parents to keep watch without disturbing the sleeping baby.
Another key aspect of the VM321-2 is its two-way audio communication system. This feature allows parents to not only hear their baby but also communicate with them. The ability to soothe a crying infant from another room is invaluable and helps in comforting babies quickly.
The VM321-2 includes multiple cameras, allowing for coverage in different rooms or angles. Parents can easily switch between cameras or view multiple perspectives on the same screen, ensuring they are always aware of their child’s surroundings. The monitor also offers a wide-angle lens, which provides an expansive view of the nursery.
In terms of range, the VM321-2 is impressive, with a reliable connection over a significant distance. The monitor operates on a secure digital frequency, minimizing interference from other devices in the home. This means that parents can move freely throughout their house while still maintaining a clear and uninterrupted connection with their baby.
Additional features include temperature monitoring, which alerts parents if their baby's room is too hot or cold, ensuring a comfortable environment. The device also comes with preloaded lullabies and soothing sounds, which can help in calming the baby to sleep.
In summary, the VTech VM321-2 is packed with features that prioritize safety, convenience, and connectivity. Its high-resolution video, two-way audio, extensive range, and additional monitoring features make it a valuable tool for modern parents. With this monitor, families can feel secure knowing they are always connected to their little ones, no matter where they are in the house.