An audio baby monitor is a device that allows parents to listen to their baby from another room. It typically consists of a transmitter unit placed near the baby and a receiver unit that parents carry with them. This technology helps parents keep an ear on their child while they are engaged in other activities around the house. These monitors operate on radio frequencies or through Wi-Fi, providing clear sound transmission. Some models also include features like adjustable volume, night lights, and two-way communication, allowing parents to soothe their baby remotely. Overall, an audio baby monitor enhances safety and peace of mind for caregivers.