Motorola AM21 is an audio monitor that uses DECT technology to stay connected to your baby, without interfering with the Wi-Fi® frequency. You can move around the house without losing connection, with a range of up to 300m* (*When there is a clear line of sight between the parent and baby units. Any obstruction between the parent and baby units will significantly reduce the range. With both parent and baby units indoors, the common range is up to 50 meters). You get warnings when out of range or when the battery is low. The high-sensitivity microphone transmits all sounds so you know when your baby is awake. You can control the volume levels from the parent unit or your mobile device. Features: DECT wireless connectivity / Wi-Fi® friendly / Unidirectional communication / Volume control on parent unit / Parent unit is powered by outlet or battery / LED power indicator (Power ON) / LED out of range indicator. Includes 1 parent unit, 1 baby unit, two power adapters, manual and instructions.